I've cleared out my "Following Hashtags" menu and I'm now only following from my own users account the FediBuzz URL's. They show up just like before so say the hashtag Linux that I'm following triggers. It shows as #Linux Boosted" which is correct for my users as I'm technically following the account "#Linux" and they are in my people following.
Maybe change the menu "Followed hashtags..." to "Relay followed hashtags..." too ? I don't know maybe not ?
However if someone does use the relay option then I think it would be better if the "relay name Boosted" could be removed so it looks like a normal post in the users feed.

CC: @grunfink@comam.es