For clarification there are two types of fan made profiles...
There are some that are yes, plastic, and they are straight up copies using a photo of the official released WDI pins. They're roughly $10, but they are cheaply made, they feel like shrinky dink plastic and have like glitter glue on them?? Also my personal opinion is this falls into a bootleg category. I get that they may be attractive for people to own something close to the pin, but they put a bad taste in my mouth. This encourages sellers to make cheap copies of any pin that is hard to obtain.
It seems every fantasy creator under the sun is doing their own version of the profiles, whether they be the princesses in alternate costumes, all the animal characters, etc. These at least usually have original artwork created just for them, but depending on who the creator is, some of these fantasy pins can fetch as much as an official profile (barf), but then yeah, some of them are cheaper in the $25-$50 range.