Your question is really confusing. Just for clarification, this is a crypto forum and this is a academy for learn about bitcoin & other crypto-currency. This is not earning platform and this forum doesn't hold users fund. So there is no opportunity for withdrawals fund.

I am guessing that OP talking about bounty campaign since he had joined one. Hope you were use your ETH address, I am not sure since that campaign disabled submission form. So if you IEO listed on exchange and they paid you on your address then you can withdraw your token on listed exchange. Otherwise if you join btc campaign then you have to use your own btc address. That's the way how you may work and withdrawal your earnings.