Thanks guys for your attention, feedback and questions
Fees are not constant and they follow the scheme: 5% -> 2.5% -> 1.25% -> 0.625%. Fees deducted before all payouts when block rewards received. Fees are going to support the project.
Such rewards system takes in account every pool member regardless of your resource power. On the other hand you get much more if your block was accepted as solution - it is guaranteed 50%. How much do you get for that in other pools with weight of shares?
Why whould anyone mine here with those fees? This is good question - you can contribute any resources in the pool and be rewarded even for that. As shown above fees are flexible and going down over time.
In the ideal world where we might find a block every 2.5 minutes means that everyone in the pool would be getting something every 2.5 minutes.