Founder(s) sold to Bendinggspoons who specialize in the kind of takeover where the buyer stops all development and tries to keep the money inflow from a service running with minimal maintenance crew. Evernote is the most famous example I think.

Apparently 80% are already gone:

https://escapecollective.com/how-komoot-lost-its-way/

(paywalled, but I think it's the definitive aftermath writeup, as opposed to all the older news that stop at speculating about layoffs that had not happened yet)