Surely that's the plan and I guess it must work to an extent or they wouldn't do it.
Would you gamble if you didn't already? Maybe not, but you may switch to Paddy Power.
Would you drink if you didn't already? I doubt it, but if you do you may try Holsten - probably not Holstein though because thats a breed of cow (sorry I couldn't resist that).
Crypto does still seem to be sucking people into its promise of free money though, so seeing it on the shirts may gain some customers who think they must be trustworthy and were considering gambling (I refuse to call it investing) on crypto. Google Kraken crypto exchange and you get: "Kraken -the crypto platform for smarter investing". Yeah right.
Personally I hate advertising and like to think it doesn't work on me; it just pisses me off and I and take all possible steps to avoid it- ad blockers on every online device, recording everything on commercial channels and starting watching 15 minutes after the start so I can fast-forward the ads at x30, shaking the loose ads out of the weekend papers and binning them straight away, that sort of thing.