There are several gallery/skin sections on WC...however there are hundreds of skinnable programs in the wild. When someone posts a wall [for example] here he will often post direct links to his other related skins which are NOT hosted here simply because we do not have a section for them.
That is off-site linking. The Galleries listed on this site are very definitely NOT all that are available elsewhere...so if a person has a whole suite of skins they may be sourced all over the place if you need to find them all.
Now, to re-iterate...TSF has commercial clients who own copyright [distribution rights] to those works. They 'allow' on occasion other avenues of access...eg from here...but due to corporate ownership/control they may [and do] prefer to be in full control by hosting them on their own servers....if/when they 'need' to withdraw them from public access they can do so with one click....and not be at the mercy of publc 'lethargy' [perhaps]....having to request their removal from a site outside their immediate control.
If and/or when you personally have a similar legal/commercial situation your works can/will be treated equally.....in other words....NO preferential treatment.
Perhaps people need to look more closely into the mechanics and machinations of property copyright and how it affects them and their distribution.
I remember one work where TSF did a private, commercial project....not to be publicly accessed...but the 'owner'...the person who commissioned the work subsequently allowed its public distribution....and Pixtudio has had similar, as I recall.
Such public distribution should be seen as a bonus....as the owner/purchaser bought sole rights to its use.....yet then allows Joe-Public to have it freely.....I see that as a plus....free yet commercial-quality works....