Is there any other legit platform that one can answer questions and get payment?
Yes, Other platforms that pays for answering questions are as follows :
Coursehero
Studypool
You can earn around $7,000 every month from this site also by answering homework of students. You can answer student's questions through Bid. Further, aside from answering, you could also earn by uploading your notes in this platform.
Zookal
This is the same with course hero but pay less.
SolutionInn
Same with studypool where you can answer questions through Bid.