That's kind of disappointing. I've never been into that scene myself but I did collect the things as a child and occasionally when we felt down my friend and I used to have a look around the customs sites and admire the gorgeous, crazy things people were doing with those broken-down little plastic ponies salvaged from the attic.
Huh, I hope Hasbro doesn't go the way of so many other companies and try to shut customs/fanworks down for good. Surely such a smalltime scene can't be hurting their sales or branding any. (In fact maybe someone should suggest that they market packs of plain unpainted ponies in various poses specifically for the customisers?)
I looked at your link AspicViper. The "Drej" one is very cool. Never seen anything like it.