Good question, I do this for a few reasons.
These are the same FPA that I use on my gallery scavenger links so this gives a place to reuse something that I already have made, zero extra work.
Also I can control exit consoles, there are non. Solves the problem of not getting paid on all exit consoles.
If they don't like what they see I have a no thank you link on these that takes them back to my hub so hopefully sooner or later they will find something that they do like. All the banners and galleries rotate each time they reload the hub which gives more exposer to my ads and keeps on showing them something new.
By having links to my FPAs from all over the place they get spidered and get some nice SE traffic, again with no extra work from me.
I haven't checked what the PR of this page is, it is somewhat new. The root of this domain use to just redirect to my link list. It is actually a symbolic link to an old hub of mine located at
http://eroritexoticfun.com/avs/ since at one time it was a hub of all my AVS sites, there are non on it now. By making it a symbolic link it is no extra work to both maintain my old hub and this new one.