In the time that I have been in this forum I have seen several posts about recruiting and developing games within the platform.
Most of these offer payments for the work but however I have always had doubts about whether there is any method to ensure the payment and the work, (the payment by the one who delivers the asset and the delivery of the work by the one who requires that same asset). Some method that both sides comply with what was agreed without being “by word and oath”.
When I do work for people or people do work for me one of the best options is for the person making the work to show the work but stopping it from being stolen, some examples:
Scripting (Show a video of the script working, then take payment before giving the script)
GFX (Show the GFX with a watermark, after being paid give the image)
Those are the examples I know best and it seems to work, because why would you complete the ask to get paid, to just not give it to them. The best way in my opinion is just to simply show proof of the work, taking payment, giving them the asset.