'If you use our service your coins are private and clean' so pay to use our service.
Except that's not true, and there are numerous examples of Wasabi coinjoins being demixed and numerous examples of centralized exchanges still discriminating against coins form Wasabi coinjoins despite their cooperation with blockchain analysis.
And I see ads for beer that tell me that if I drink their beer women will adore me and I'll be a party animal.
It's marketing good / bad / true / not true it does not matter it's marketing and people will believe what they want.
And, following that thought. The people Wasabi are marketing to can then market to their customers with the same stuff.
'Look we do this with that use our service'
-Dave