I get regular pitches from ad companies that I have never heard of. I never reply, because their pitches never offer any details and I don't have time or energy to have a long email exchange. I assume most of them are legit, or close enough, but the people in charge of reaching out to sucky bloggers like me are really horrible at it. So here's some advice that they'll never read, if they actually want people like me to bite:
1) What kind of ads?
2) How much do they pay (per click/per impression/whatever)? How much will they guarantee?
3) How long will it take me to be paid? How will I get paid?
I get a few of these every month. Include these answers in the pitch and maybe I will respond. Until then, keep giving me some of Jeff Bezos's money.