Can you provide some figures, in terms of profitability? How much did it cost to put together, what are the monthly costs to keep it afloat? I write a book and

Can you provide some figures, in terms of profitability? How much did it cost to put together, what are the monthly costs to keep it afloat? I write a book and give it away for free on https://book.railean.net https://book.railean.net, but it wouldn't hurt to turn it into a revenue stream.