New US law and tighter scrutiny by DOJ is making it hard for offshore sportsbooks to pay winners. Consequently there are reams of complaints on websites/forums dedicated to that industry. As a result of that, deposits to sportsbooks are WAY down, putting the squeeze on the offshores even harder.
If you have any $$$ sitting in an offshore sportsbook waiting for the new NFL season to start, I suggest you get it out ASAP. Good luck, tho, you may not be able to do so.