There's a lot of reasons I'm concerned about this one. Largely, we need to consider what Hypixel is known for. Apparently, while it was popular, it also popularized some really scummy moves in the Minecraft community and caught flak. Things like microtransactions and pay to win. I don't know, I never checked it.
The terms of service have come out and while it is moddable, the only thing you're not allowed to mod is the client. That's slightly concerning because that could be used to push ad content at you or mine data and you can't do a thing about it, made worse by the following:
Riot games is an investor. Not only has this company had some PR issues due to people being weird in the company, but it's also owned by Tencent, the chinese megacorporation that moves in on just about every other game and is also maintaining the crazy dystopian network that keeps track of chinese citizens' "Social score." Spooky stuff.
On the plus side, if modding is as open-ended as I hear it is, even an idiot like me could create really cool buildings and creatures with little to no programming knowledge.
I'd say to err on the side of caution here. I already signed up for the beta, though, so I'll have to review these facts when I actually get to check it out.
