Sponsorship
Everything on this site — the OSS, the benchmarked experiments, the papers — is published free and built independently. Sponsorship is what keeps that loop running. There are two ways in: sponsor the work itself, or place your product in the site's ad slot.
- 40+Books (Kindle+Zenn)
- 400K+Total PV (Qiita+Zenn)
- 4Research papers
- 6OSS projects
Figures as of 2026-07.
What your sponsorship enables
- New open-source releases — the weekly-ship series puts a new tool or app into the public every week
- Reproducible AI experiments, published free — measured numbers, not vibes: agent cost benchmarks, local-GPU model tests, LLMO field data
- Independent research — 4 papers on Zenodo so far (AI text analysis, VLM color bias, agent economics), with more in the pipeline
- Long-term maintenance — issue triage and upkeep on the projects below, not abandonware
- Documentation — llms.txt, publication indexes, and guides kept current in four languages
Projects your sponsorship supports
- compact-ops — Keeps Claude Code sessions coherent across context compaction
- domain-pre-flight — Pre-registration checks for domain names — history, typosquats, LLMO
- historymap — One YAML file becomes an embeddable product-history timeline
- voice-clone — Voice cloning experiments for voice AI research
- speech-habit-lens — Speech habit analyzer combining acoustic emotion params with an LLM
- persona-hub — Personality-test platform SDK and API
This list keeps growing — new tools from the weekly-ship series join it as they go public.
Where the money goes
- GPU time for local model experiments
- Domains & hosting
- OSS maintenance
- Research experiment costs
- Book publishing (covers, editions, translations)
- Documentation
Individual sponsor tiers
GitHub Sponsors has three personal tiers — a supporter floor, a monthly curated digest, and a book-library membership. Reader Membership is the one designed to pay for itself: every current book PDF plus every new release, and the monthly digest on top.
- Your name on the sponsor wall with one link of your choice (X, GitHub, personal site, socials, etc.)
- Monthly update — posts, OSS releases, highlights from the month
What's on my mind this month, delivered as a 10-minute read.
- Monthly 10-minute digest — what I'm thinking about, OSS in progress, research notes, what's coming next
- Everything in Supporter
Designed to cost less than buying my books one by one.
- Full PDF library (10+ books, new releases auto-added)
- Everything in Ken's Monthly Signal
Book PDFs cover the titles I hold the direct-distribution rights to. Titles under commercial publishing contracts, Kindle exclusivity, or similar restrictions are excluded during the contract term; the covered list is refreshed as titles roll off those restrictions.
If my books, tools, or research have saved you time, pick the tier that fits — or drop a one-time tip.
Founding Sponsors — first 10 individuals
The first 10 individual sponsors on any personal tier get a Founding Sponsor badge on this page for as long as they remain a sponsor. It's a thank-you for showing up before the numbers were public.
The ad slot — for companies and individuals
A single, quiet card in the corner of every article and product page. No pop-ups, no tracking pixels, no dark patterns — a labeled card that readers can dismiss.
It doesn't have to be a company product. An X account, a newsletter, a book, an event — anything you want in front of engineers works as a creative. The current rotation includes a card for my own X account — the live card is showing in the bottom-left corner of this very page (and on every article).
The card floats bottom-left, styled to match the site rather than shout over it. The rotation currently runs house ads for my own books — that's the live demo. It runs across the blog (280+ engineering articles on AI agents, Claude Code, LLMO and WebRTC, published daily in four languages), the products pages, and about. Placement can be rotation-wide or pinned to a topic cluster you choose.
Principles
- Every sponsored card carries a visible Sponsored label
- One card per page, dismissible, stays dismissed for the session
- Impressions count only when the card is actually seen (50%+ visible for 1 second) — no page-load inflation
- Measurement is GA4 only. No sponsor pixels, no retargeting, no reader data shared — if you need your own analytics, just add UTM or other tracking parameters to your landing URL and measure on your side
- I only take sponsors whose product I'd plausibly recommend to this audience — developer tools, books, services for engineers
Numbers
The slot launched in July 2026 and impressions/CTR are measured now (viewport-verified, per creative, per placement). First public numbers will be posted here after a full month of data. Until then, pricing is launch pricing; new-sponsor prices will be revised once data is public, and active sponsors keep their term price.
Pricing (launch reference)
| Plan | What you get | Monthly | Renewal (2nd term+) |
|---|---|---|---|
| Rotation | Your card in the site-wide rotation, all placements, all languages you provide copy for | $50 | $45 (10% off) |
| Contextual | Pinned to a topic cluster you choose (e.g. Claude Code articles only) + rotation elsewhere | from $100 | from $90 (10% off) |
Base term is 3 months. Renewal from the 2nd term is 10% off. Once one month of impression data is public, new-sponsor pricing will be revised — active sponsors lock in their term price. Billing via Stripe (card or invoice).
Get in touch
Email imoto@propel-lab.co.jp with a line about your product and a link. I reply within five business days, including a straight "this isn't a fit" if it isn't one.