A few updates.
Xerver.co is gone. Without payment processing there wasn't much alternative but to close. They have left a sizeable outstanding bill with a few web hosting companies.
Keep2Share has reduced the size of it's infrastructure as they struggle to maintain payment processing (resorting to Google Wallet) and desperately trying to get re-bills activated on their current merchant facility (which will probably be shut down any day now). Keep2Share was one of several sites in the MoneyPlatform network. Below is a link to an image showing the extensive infrastructure the network used prior to their problems.
http://stopfilelockers.com/data/moneyplatform.png
OBoom is suffering downtime and uploaders are unhappy about not being paid. They probably won't recover entirely and this will become just another lost venture of Deniz Cetindag of Uploaded.net
New file hosts keep popping up with Paypal and we keep removing their processing. The key here is to cut them off at the knees before they can graduate to merchant accounts.