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He builds it in public so maybe you can find more details on his X profile. Last time he shared the server cost was about $5k/mo https://x.com/dmytrokrasun/status/1917817087461933560?s=46

I spent a lot on servers. Around $5500 all monthly expenses.

Dug around their twitter a bit and they mentioned at one point having $14K MRR and $4K expenses