The extra mana can be put to work by combo or control decks alike, and while these decks are less incentivized to damage themselves, you can mitigate this downside by pairing it with win conditions and/or interactive spells that effectively leverage the Treasure tokens
Some players have added Landorus- EX : as a quick way to Knock Out the pesky Bunnelby, and others have started to include Hypnotoxic Laser and Virbank City Gym ( Black & WhitePlasma Storm, 126/135) to generate some offense in the deck
League Promo is given away to every player who joins the league this season
Play works well with Faithless looting and is powerful enough to see some play in Big Red and counter burn decks where it has single handedly taken some games with big back to back dome shots
Scarlet and Violet professors Sada and Turo are getting their own Trainer cards, too
If your opponents Active Basic Pokemon is Knocked Out by damage from this attack, take 2 more Prize cards