FoundationDB was a closed-source database. It was never open-source.
They had only open-sourced the SQL-Layer on top of their key/value store and it's still available on Github. The reason: They build it based on open-source code
When someone deletes a public repository on Github, one fork remains as the new master. (Here's FoundationDB's SQL-Layer: https://github.com/louisrli/sql-layer)
So: RethinkDB will stay, even if someone tries to pull the plug. Just fork them on Github. :)
They had only open-sourced the SQL-Layer on top of their key/value store and it's still available on Github. The reason: They build it based on open-source code
When someone deletes a public repository on Github, one fork remains as the new master. (Here's FoundationDB's SQL-Layer: https://github.com/louisrli/sql-layer)
So: RethinkDB will stay, even if someone tries to pull the plug. Just fork them on Github. :)