A little update:
We have introduced limit orders, added orderbooks and price charts to the interface along with several minor changes, improved overall user experience.
Bitcoin investments are now paying up to 1-1.2% weekly. Altcoin investment's profitability heavily depends on situation at the markets, but may be up to 1% weekly as well.
Traders make 50% of deposit on big turns easily, hitting 200% sometimes.
Although losses may be as big as well, we did not see them much.