Pinto - I realize you don't know me but please don't assume that I am as naive as to not read a TOS.
nyar1ath0tep - it is stated on the sign-up page that they won't sell or give away your info.

Poser City is an up-and-coming community - much like Renderosity, 3D Commune, and many others out there.
As a Poser City member I get my downloads directly from there, but I do understand the round-about way of getting membership is perhaps not the best way. Ya can't fault a webmaster for wanting to garner traffic and membership.

In any case - think about it - even if the link had gone directly to the page that has the download - and you had clicked on it to download - as a non-member (or a non-logged in one) you may have been prompted to either log-in or join if the webcommunity or site had been a member's access one only.
I dunno - that's just my laid back, got bigger things in life to worry about attitude. ;)