To be honest, I'm not so sure. Especially in the tech scene, enough people are anti ads/sponsorship that I'd generally avoid reaching out unless I saw they were already doing it or were keen to monetize. Even having a sample unit or "hello bar" mentioning you're taking on sponsorships would increase the likelihood of someone reaching out, all IMHO of course.
Oh, what I meant was that often people who run blogs or open source projects are anti-ads/monetization and so dislike being approached by companies wanting to give them money.
