mybrowsercash referral shares question

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mybrowsercash referral shares program says that when the positions that you bought matured after 60 days, you will then earn money, but will be divided in two portions. a big amount of your earning will be put inside purchase balance. but you can't cash out anything that's inside the purchase balance. these are the funds that you will be using to advertise. and a small amount of your earning will be put inside your account balance. this are the funds that you really can cash out anytime you reach minimum payout. so the question is, is it really profitable to use that program? can you really get all the earnings that you get after your referral shares positions matured?