I put this in the other post too. This is literally their description on steam.
Combine valid poker hands with unique Joker cards in order to create varied synergies and builds. Earn enough chips to beat devious blinds, all while uncovering hidden bonus hands and decks as you progress. You’re going to need every edge you can get in order to reach the boss blind, beat the final ante and secure victory.
Combined with playing actual poker hands, yeah that's going to get tagged for gambling. They knew what they were doing and this performative outrage is a viral marketing campaign.