Escape From Tarkov was so busted, because first they've supported cheaters (one cheater, with bought cheat for a few $, made around $2k++ monthly boosting players etc.) when Tarkov dev banned them, they will easily rebuy new account. Easy money for both parties, win-win scenario.

Second, their code for networking was complete BS, they didn't even sanity-check player movement/location server-side and many more things. Ridiculous.