Even if I depost 1 BTC and get 0.02 BTC back , you would keep 0.00014 only.
You would earn 9 cents for a 1 BTC deposit.
If you are really an investment fund , you need a much higher fee , otherwise you are just a well disguised ponzi.
Fees are calculated on investment not on profit,if you deposit 1 BTC (you can't because maximum investment is 0.2 BTC) i would keep 0.007 BTC (4.26 usd), and also you choose your desired profit (from 2 to 20%)
I know the fees are low but it's a new service and (maybe) farther i would increase the fees
How much fee you think it's reasonable?
I don't really know.
I'd expect a minimum of 25% of profits.
Well i can make more than 20-25% but the fact is how much time you will get the btc back, for ex. 1 day i can make 5% other day 10% and so on till i reach 25%(or your desired profit) it's not instant and it require time, that's because i fixed the max target profit to 20% so you get your btc back in a reasonable time.