Yeah, unfortunately on the internet there's no way to truly know someone's intentions. What you've written sounds legit and I'm generally of the view "trust first but rescind that trust immediately and totally if proven otherwise". A quick browse of your profile and you seem human and genuine.

So with that said, I trust you have good honest intentions and I can see how something like this could be beneficial to people. The difficulty is that good intentions alone isn't enough, there's a huge potential for corruption of this idea and I've been around the internet long enough now to see how a small well intentioned initiative can quickly become a vast unwieldy monster. There's a reason most instances have a near zero tolerance of adverts, because if you give an inch they'll take a mile.

If it were contained to one thread or community (allowing for easy blocking/ignoring by those who don't wish to see adverts, even if from real human experienced), with strict rules and moderation from the beginning, then perhaps it could be something of value to the community. However, I'm sceptical of its ability to be beneficial long term. It only takes 1 person with ill intent to find it, spread the word, and the manipulation and corruption begins.

I have no authority here, I'm just a user, that's just my thoughts on the potential pros and cons of such an initiative. Personally, I don't think it's a good idea. If you go for it though, good luck, I hope it can be of benefit to the community and with vigilance the rot will be held off.