As others have already mentioned, why would someone choose to use your site over a more established site like gofundme or even patreon if they wanted to tie rewards/services to donations?

Who do you envision your target audience to be? Someone who is undergoing a rough patch who is too proud to go on gofundme and has time to spare to work odd jobs? Who do you envision your target audience's target to be? People who would otherwise donate to a given person's gofundme? Strangers who would use the app to exploit desperate people in their local area?

All that being said, if the users on your page are real, then you are undoubtedly impacting real lives, comments be damned. If they're not, well that feels a bit unsavory since it is not explicit that these are false. It could also give people the wrong expectations in terms of potential payout from your platform.