The calculation relating to the extraction is subject to a series of technical variables on which Swag cannot affect. The variables concern, for example, the performance of the machine and the difficulty. For this reason it is not objectively possible to indicate an exact ratio and In fact. Swag deals only with the rental of the machines, obviously offered at the best possible conditions on the market, but without the possibility of intervening in any way on the results that can be obtained, by definition variable and not known. In the end, the BTC spent in the rental is not returned.