It's simple.
I give you a link to an online casino or tell you where to find the link.
You and all your friends deposit and play at the casino.
I'll give you £15 for every person you get to sign up and deposit.
You simply need to provide me with a screenshot for proof.
If you want i can give you a link and you make people deposit and i give you $100 per lead UK or Germany ... Easy right ? And offer much better than you have
I have a lot experience at casinos from diferent countries and I usually play at bet365. I could join more friends to your offer if you are winning with it.