yes

I know this from sources I cannot disclose, but apart from that the fact that they’re not using the Nextcloud trademark/logo should speak for itself

NextCloud makes money from companies/organisations that resell/host the software for the public or use it for their own people. Every organisation has the option not to give money to Nextcloud, but if you can afford it and don’t do it anyway, it’s a shitty thing to do, imo

Sadly, the company that develops Nextcloud doesn’t see a dime from that, so it’s not really sustainable