Oh, I see.

Not
100% sure about the EULA stuff... but what little I do know would suggest that it's ok.
I've picked up a few titbits of knowledge on this from users more "in the know" than myself, and I as far as I can gather, it all comes down to two things: percentage of alteration to initial subject, and patent ownership of file format.
In the case of the former, I read from studies done by Beosboxboy that an alteration of 11% or greater reclassifies the custom content as unprotected - assuming I've understood correctly - now, given these feet were extracted from a full body model(I'm assuming), more than 89% of the model has been eliminated from the "end product", thus I would venture to assume that constitutes more than an 11% change.
Furthermore, Poser itself is a freely available software package(it's just the premium object meshes one has to purchase), but even if it weren't, I don't believe that restricts the cirulation - even for profit - of work produced using it. It's a tool that can be used for professional purposes, no? Just as music produced by/for professional artists
can be legitimately created on professional software suites. In any event, the issue of commercial enterprise is negated because this work is offered up for free.
In any case, numerous internet sites do exist in which artists host work produced using professional art software - be it "painted" in Photoshop or rendered in 3D packages such as Poser or others of a similar nature. Some of that art is hosted free, and some isn't... but I believe it doesn't matter since the artist holds ownership of the work, whilst the software company holds ownership of the suite and its code. Ie. it's illegal to redistribute the software, but
not work you've produced on it.
Now on the second issue - patent of the file type. That, I believe rests with Maxis. You see, Maxis own the patent of the .package file, I learnt recently, hence the veto or permission to redistribute sims' custom content rests with them. I'm sure it goes without saying that Maxis permit - nay encourage - the circulation of custom content for the sims, and they have stated such, because that's the whole point of the Exchange not only existing on the web but actually being accessible from "in-game".
Maxis' only disapproval is over .package file content being distributed for profit. In other words, they approve and encourage custom content being shared for free, but are none too happy about paysites.
Point is, these feet - if I understand correctly - are in the form of a .package file, and that means that the patent on them rests with Maxis.... and Maxis' only caveat is, "don't charge for it".
I confess I'm no expert, and I do know there are users with a deeper knowledge of this than myself, but I
believe it's safe to distribute these feet.