I wouldn't have either, not even if you gave the product away for free in return. To me, spamming people that chose to listen to me on whatever site or medium

I wouldn't have either, not even if you gave the product away for free in return. To me, spamming people that chose to listen to me on whatever site or medium seems like an egregious violation of trust. If I link to or recommend something, I want that to be meaningful. I'll do it gladly if I like your product, but not because you've bought me for a couple cents.