There are plenty. Here's a few posted on HN:

RethinkDB was very straight forward: https://rethinkdb.com/blog/rethinkdb-shutdown/

Wattage too: https://rethinkdb.com/blog/rethinkdb-shutdown/

Hackpad from a few days ago: https://hackpad.com/

The above make their intentions unmistakably clear in the first line.