The reason why everyone wants to get paid in bitcoin or ETH is because they don't want to wait when bounty is over,they want quick rewards,i prefer to get paid in tokens because it will be a lot profitable than getting paid in ETH or btc
OP Want to pay with ETH or BTC because he want to get real money for their hard work. Of course if you get tokens and can be traded on big exchange will more profitable. But, how if projects you join for bounty, become a scam? We can't sell their token. our hard work just for waste our times.
maybe thats a good idea,
but for a new project without good capital in the beginning,
i think they didn't have enough money to pay the rewards with bitcoin or ethereum my friend
so, they will pay our rewards with token