I'm guilty of dumping money into Overwatch's loot boxes back when the game was super popular. I don't exactly know the amount of money I put into the game but I know it was too much. I regret it now that Blizzard's true colors have been exposed over the past few years.
If you're one of the super-rare people that have never spent a dime on them, then good for you. Keep doing that.
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None now. The most I spent was $20 in Warframe, but that was because the Stalker War bundle had a massive sale. I spent $5 on Destiny 1 years and years ago. I’m not going to bother spending anything more in WF because I rarely play it anymore.