Looking at the downward trend in volumes, I suspect the profits come from the results of selling their bitcoins they have been holding in the balance sheet, the service itself is unprofitable.
Selling assets pumps up the bottom line, but if that's your only source of income, you're better off just liquidating the company and cutting the losses
My gusss is: If they take a cut in crypto and that crypto increases in value, that increase wouldn't be turnover but it would be profit?