I spotted this very interesting article from the News Hound:

Betfair's 'Happy Hour' & 888.com's 8-spins ads squashed

Two online gambling companies ran afoul of the UK Advertising Standards Authority this week for advertisements/promos deemed questionable & raised as complaints with the advertising watchdog.
Full Story...

Whether this will help all the players that BetFair stole money from or not is another question, but it certainly wont harm their cause...