Forking OSS isn't bad faith. If you want to make people pay you, make your software proprietary. In that case, however, you wouldn't get the free ride into the market that being OSS gives you.
I get that this is inconvenient for Elastic, but it’s good for users.
> The Apache License is a permissive free software license written by the Apache Software Foundation(ASF).[6] It allows users to use the software for any purpose, to distribute it, to modify it, and to distribute modified versions of the software under the terms of the license, without concern for royalties