idk, seems like a pretty standard condition. Other platforms have something similar, allowing e.g. Amazon to cancel Parler's account on their services. Nobody is required to give you a platform, and if you already think that you intend to use their platform for something they will find objectionable, you should reconsider your moral compass.
Yep, very standard. Here’s the WordPress TOS as another example, under their e-commerce section:
> We may terminate your access to our Services or force refunds (where possible) to your subscribers and customers without notice to you if we determine (in our sole discretion) that your use violates the Agreement, or if a payment processor or regulatory authority requires it.
And, like with WordPress, users of Nakama can still use the open source version without having to ask for any sort of permission. This is much greater user freedom than the average closed-source SaaS.
What an individual may find objectional and what an organization with a founded interest in maintaining a positive public image in the todays political turbulence may find objectional are very different things. It's far too easy to stray on the wrong side of the masses for even the slightest perceived misstep.