There has to be more to this story. I would like to hear the bookmakers side of this. Perhaps the researchers were scripting or triggered some other kind of security tripwire.

Winning $900 split across several different bookmakers is absolutely nothing in the sports betting industry.

William Hill, one of the companies that the researchers claim restricted them is a multi billion dollar company. They aren't sweating small time bets like this.

EDIT: I noticed that the screenshots they used as proof their bets were restricted are for bets on very minor football leagues (Australian semi pro football), its common for betting limits to be lower for games that don't see a lot of betting action & is not proof enough to me that the bookmakers lowered their limits globally