It would be interesting to know how many attempts were spent before such a result was achieved. It is always nice to see when someone achieves such a profitable result, but for the sake of objectivity, I want to know what is behind it.
I have no idea, like as mu_enrico said it's "passion". Someone would run away if something is no longer profitable :v I posted about withdrawal vs deposit in the Rollbit thread, I forgot when I did it on Duelbits https://bitcointalk.org/index.php?topic=5279042.msg58508049#msg58508049