If Discord was open source, I actually would not mind paying a fee for it. Fixed or reccurring, ideally the former. But that's never happening. And forget buying that Nitro thing.
I gotta admit, I have no problem with introducing a completely new feature and locking it to paying members. But taking away an already existing feature from non-members, or limiting it in some way, is simply outrageous. They could've kept the upload limit at 25MB, and increased it for Nitro users to something like an entire gigabyte. This would've encouraged people to get Nitro. But lowering the upload limit for free users would just encourage them to leave and find an alternative (and the problem is that there aren't any viable ones because they aren't used as much).
I am fortunate enough to know how to set up VMs and use Linux, so I run my own IRC server with a web interface (TheLounge). I can set the upload limit to what I want and settled for 100MB. This way my friends and I are not at the mercy of some proprietary software.
I do pay for a dedicated server that I also use to host my games' servers and also a mumble server, but it's so worth it, just to have control over our stuff.
Also, if storing all that data is hard...trim all the chat logs after awhile....oh wait...then you wouldn't be able to keep records of everything everyone's ever done on there.