It depends on the type of gambling. Sports based gambling has basically disappeared. Bingo/slots/casual games are up in general I think.
Good point - I was thinking card games really, and it's true that most sports betting is currently frozen - although there are reports that minor leagues (which are still running in some countries) are being heavily targeted by desperated punters and gambling orgs.
Lulz, classic case of bad incentive: I bet revenues for online gambling are way up at the moment, now that more and more people are forced to stay home and be fundamentally unsupervised all day. But because stock markets are drying up across the board, stellar profits might well not get reflected in stock prices.
Just another reason for not basing exec compensation on stock prices.