[quote ]
First time I stacked BCO I paid something like 14 BCO.

Users need to be warned about the stacking fees, when stacking small amounts for a small period of time it will be a loss.
[/quote]

Are you joking? The hole calculation is open. You are able to calculate with the daily traffic from the exchange. So it is very easy to calculate your rewards. The staking fees are very clear too. The fees atm are about 0,2 BCO. That is not much, if you stake ~1000 or more BCO.