Hello I will pay for you to advertise my bitcoin buying and selling business. I pay 30% of my profit for leads.
If you're going to do it that way, why not do it like how most websites do it? Add an affiliate/referral program. That way, you wouldn't need everyone to message you individually. Of course, completely assuming that your "crypto company" is legitimate in the first place.
You'll need to have decent traffic people to even consider shilling for your product, and since I'm assuming that the OP's project is a relatively new one and doesn't have a lot of traffic for this to happen.
this not how to go about it at all in this era of scam. No information on the project and the team behind it, what kind of advert do want? reach out the campaign managers on the forum, the credible one not those that only bring scam projects, they should put you through and be ready to prove you are reliable. The cost of advert at this moment is still cheap and few members could be enough depending on your budget, be careful with forum member with negative trust or low rank and dont exchange fund if they are not well verified.
He isn't looking to spend money to make money (even though he should be), he basically wants you to bring him people to profit off, and then he will cut you into what profits he's making off them, simple referral systems.