Basically card games are predatory by nature and are the model on which computer gacha games with all the infamous tricks are modelled. Hell basically entire game is a lootbox, each booster is a lootbox. Also expect breakneck pace at publishing new expansions and dozens of special editions and so on and on. If you plan to participate in events like tourneys and so on, the deck formats come in play, standard format require to basically get a new deck every time new expansion come out (usually around every 3 months), and in open format, theoretically for casuals but in reality for whales, prepare to get utterly crushed (idk if Lorcana have those but MtG had like 100 type of deck in open format that can win in a single round, i witnessed games that were resolved with just the coin toss who starts).

And i would be even more wary with Lorcana than MtG because it's clearly aimed at children and with all unilmited hate i have for WotC, it's even worse, it's Disney, the company who just recently tried to slid off from death of a woman by invoking her husband free trial at slop TV as something in kind of devil's contract for soul.