You must need to provide more information how you will be pushing transactions for confirmations and how much reward you will be expecting for this services. I foresee that you might be having more chances to hit this services.

I hear bitcoin.com already into provide similar paid services but they charge through card payments.
I got a suggestion for you : accept fee for your services with Xapo/Coinbase/altcoins. As Xapo to Xapo and coinbase to coinbase tx are fees free. Altcoins payments are possible with lesser than 200 satoshi as fees.