Sponsor comparison
GDKeys vs Oboe
Newsletter sponsorship activity, audience reach, and ad formats — side by side.
Sponsorship breakdown
Technology
Artificial Intelligence
AI with Kyle
250K subscribers
Tim Ferriss
1.5M subscribers
250K subs
1.5M subs
Probably one of the best known non videogame skill trees out there is Duolingo..…
AI-powered learning platform where Tim Ferriss is an investor. Promoted with the…
April 2026
December 2025
Ad copy examples
GDKeys
Probably one of the best known non videogame skill trees out there is Duolingo... https://gdkeys.com/keys-to-meaningful-skill-trees/
Oboe
AI-powered learning platform where Tim Ferriss is an investor. Promoted with the URL oboe.fyi where users can create custom courses.
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