I (and everyone I suppose) received 0.02% from the discounts. This is cool, but it would take a really long time (couple of years maybe) to cover the 0.5% withdrawal fee. So yes, it is a nice service, but people will not earn money by using Flexcoin. They will just pay less fees to withdraw.
if you have more coins, you get a higher percentage interest payout...it's determined by a ratio of your coins to total coins on server, not a flat interest percentage
Make transfers to his ID you do actually earn money, transferring to his ID is FREE. But you still collect from the people that still use old school bitcoin addresses.
We are trying to make bitcoins easier for the general population.