Hi,
I have a large repo size with almost 2.02 GB, so I have duplicated it to another temp repo to test the BFG cleaner on it before using the BFG on the original repo, after following the BFG documentation, and ran all the needed commands, then pushing the decreased sized repo(415MB) to the remote repo, the repo size became 2.15 GB.
So, please run a git gc on the remote to clean up the server. Thank you!