Online store Promotion

Hello there, I have a newly started dropshipping website and I have a proposal for you... If you promote the website and I get sales in the first 30 days, you will get a 3 dollars for every sale I make within that time period, which may go well above 100 dollars However, If I don't get any sales, I will pay for the plan fee. I hope I am not overstepping my boundaries. Please let me know if that will work for you and please ask me if you have any questions. Thank You.