888 are running 'Live casino blackjack Sundays'

The premise is pretty cool...
Between 18:00 and 20:00 GMT they're adding bonus cards worth £25/$25/€25 to the decks on their 888-dedicated tables. Get dealt one of these cards and the bonus (5x wager terms) is credited to your account.

The promo pages states "Make Sundays special – win up to £500/$500/€500!"

What is a little unclear in the terms (if anyone from 888 drops by pls help clarify) is whether £500/$500/€500 is:
a) the upper limit each player can win in bonus funds; or
b) the total value of bonus cards inserted and shared by all players.

Obviously we're hoping the answer is a)

cheers
LD