Says what it is not
Naming the anti-pattern earns instant credibility.
A developer conference site aimed at a sceptical audience.

DevSync sells to engineers, an audience allergic to marketing, so the page states what it is not — no keynote fluff, no vendor pitches — as clearly as what it is.
A reviewed programme and free recordings are trust signals for a group that has been burned by conferences that were really trade shows.
Ticketed conference with sponsorship. Credibility with a sceptical audience is the constraint, so the programme is protected from sponsor influence.
Naming the anti-pattern earns instant credibility.
A committee signals the talks were not bought.
Generosity that costs little and builds reputation.