What is the best business model for tutors' referral site?

I am planning to start tutors referral site. I am not sure which business model is profitable and more attractive to potential tutors. Should I a coll

I am planning to start tutors' referral site. I am not sure which business model is profitable and more attractive to potential tutors. Should I a collect fee from teachers each time when I refer students or take out a certain percentage from teachers' paycheck? I would like to hear your opinions. Thanks.

or:I am planning to start tutors' referral site. I am not sure which business model is profitable and more attractive to potential tutors. Should I a collect fee from teachers each time when I refer students or take out a certain percentage from teachers' paycheck? I would like to hear your opinions. Thanks.

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