re: Crypto Trading Bots

Cautious investor, got about $1k into Bitcoin a year ago after several years following crypto. Been a pretty wild ride by my standards. Trading bots are intriguing, I already practice DCA. Couple of questions on 3commas if anyone cares to chime in, apologies if already asked:

Is this service legitimate? Do they make money on just subscription fees, or is there something I don't recognize yet? I understand there are trading fees on the external platform, but I don't quite understand the 3commas business model. Will the bot trade you into debt, and/or can this outcome be mitigated through the user settings? What are the consequences when you land upside down?

Crypto trading is funny money for me, but I believe we're just getting a peek into a very different future. I'm a baby, any replies appreciated.