Thank You for the replies. This is very valuable information for us. Appreciated!
Yes, I am aware why staking system is the only working mechanism for ICO bounties right now. At the moment we are building our platform with a 'classical' approach, using stakes and paying with ICO tokens.
But the idea to implement ETH/USDT payments has a lot of great benefits and opens new horizons. We are looking forward to moving in that direction too.