There have been a lot of LLs that also use galleries - besides the obvious Tommys, PK added in galleries (not mixed but on the same site) RR has had galleries for some time, and if you hunt around Greenies you will probably find some galleries (I know where they are
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and I know that DDave and my site do it as well.
I think the real question should be - is the mixing of free sites and galleries in the same categories like Tommy does a good model or does it "pollute" the LL?
I think that with trusted submitters only - using galleries in the LL cats is very reasonable and with the advent of hosted galleries makes loads of sense - I also know of TGPs out there that do link to free sites as well - pornstarfinder comes to mind and I had originally done it on pornstarstgp - I dont think there is anything wrong with mixing the two and definitely gives some nice variety - however -
I would never open my LL to public gallery submits without some sort of pass/trusted status. Hell I already get a hundred or so galleries a day when I dont even take them publicly - I can imagine the size of the database if I opened it up.
Just my opinions