Astrangerhere, your TBR is what you make of it. I just happen to keep only purchased stuff in my TBR so that I can focus on reading those FIRST. I have hundreds (blame it on some sales in 2012).
Being the keeper of the library is why I separate the freebees from everything else in the General library. I don't want to spend my time fixing tags and series for something that may never be read. One day, I'll spend an afternoon deleting stuff that is no longer of interest to me and that pares it down well. I TRIED to do what Paul did (delete them all) and couldn't bring myself to do that.
But I DO get them out of my Amazon library which is already unmanageable with the keepers.