What's your question? I mean different types of services exist. You're currently on a platform powered by volunteers. If you don't like it, there is alternatives like Reddit which is a commercial / for-profit company.
We have projects like Lemmy, Linux and the whole Free Software which somewhat relies on kindness and giving. It's the same for charity, your schools extracurricular club where parents and teachers volunteer their time and energy. Or bring cake to a special day.
And with the "trust": I think it's more nuanced. You also rely on other peoples kindness to stop at the red light at a traffic junction and not crash into you at full speed. Theoretically nothing is stopping them. It's the same concept, you're forced to cooperate sometimes and rely on other people to abide by the law and also cooperate. It regularly works fine. Just make a good choice whom you trust and why.
You don't need to worry about your IP. It's really not a big deal if people know it... I'd have a look at who's running a service once I upload private documents with my finances etc, photos of me... More than random ramblings. And experience shows also the services that don't rely on volunteering aren't a safe bet. Most of the big companies and platforms have been hacked. https://haveibeenpwned.com/ lists my email AND password has been lost at least 3 times by the big players.
And regarding you specifically... I already know enough about you by reading your public posts. You're probably from the USA. At least I didn't find comments in other languages, and statistics tell me people here are either american or german. You use Android, know what FOSS is, seem to like it and play things like Supertuxkart. You like to waste some of your time in meme communities and casual conversation and just created this account yesterday. And you talk a certain way which makes me think this isn't your first time on the internet. What else am I supposed to deduct by knowing your IP?
You're right asking the question "should I trust you with my data". That is why I don't use Facebook, Microsoft, bonus cards, TEMU...