That doesn’t seem to be how TLs work here.
I lost TL3 status despite well exceeding every requirement other than posts read. So, just quickly scroll through a few thousand posts in the various games threads and later that day I reach TL3.
(And don’t get me started on how opaque this all was in the first place.)
Did my engagement improve? No. I don’t know if this is something specific to BB but it seems like a pretty silly metric.