No amount stated by the OP, no escrow uses.
And low rank user. Can you show more details please, seems there's a lot of users here want to join you, but the details shown is not enough and not that informative.
Better also to use escrow for this service nothing will gonna work on this because you just newbie, unless you gonna pay upfront.
I agree with this, if you want to really promote something do it properly. OP's ad did not include,
1. The product/service to be promoted (for all we know this signature campaign will be promoting a ponzi or something illegal)
2. No clear compensation for the participants
3. No manager but probably OP himself.
4. No funds escrowed, which means there is no guarantee of being paid
Generally, this is a bit shady in my book.