I've been lurking a bit, just reading about investing in bankrolls to make a return on coin. I couldn't find any hard numbers anywhere on average returns per website, other than anecdotes from posts. Are there any official charts somewhere that show average profit/loss for the major sites?
The house does not always win. They do lose as well. They only win in the long run. Hence, your winning chance depends on your investment time. Again Luck!