You have to find a brain rewarding system that is not too difficult but not easily solvable by machines. Something that cannot be coded by a non-programmer, non-hacker, non-scripter in a google spreadsheet in 30 minutes.
If you do not, then this project will not be taken seriously, because it can be exploited very easily.
https://ibb.co/dvRoLxhttps://ibb.co/m2c67c