just don't buy anything in that game, for a digital item, war thunder vehicles are insanely expensive, and it will give you sunk cost fallacy that will force you to feel the need to never stop playing. Why would you spend money in a game that is free to play, anyways?
If you never buy anything you'll get bored of war thunder's gameplay loop that hasn't been changed in decades and grow out of playing it, but im not going to tell you to just give it up and stop playing it right now like a leaky nigger, i don't care that much if you play what you like
Way back when in 2011 World of Tanks was signed in by Guinness world records for having the most players online simultaneously in one MMO server, and then slowly by each year they get more greedy, add more payable contents, until everybody left, and many people preferred to use the new competitor war thunder instead. now like 2 people play that slop, pretty much the exact same thing will happen to war thunder