For me it's more of a rubber meets road issue. Whenever a Harry Potter franchise something is released it becomes a circus of highly performative transphobia that spills into trans spaces as certain people want to not just enjoy their Potter related paraphernalia.. they suddenly find a wave of harassment to ride and do not seem content until they have hunted down trans spaces, people or allies to rub our noses in the fact they are having a really good time while spewing anti-trans sentiments everywhere as they do.

Being a trans person in public and seeing someone wearing Harry Potter related merch out and proud in the world can be a red flag in the sense that marks out a person as more than likely mildly anti trans on the safer side but a decent number of them who have held strong til this point are not nessisarily shy about being openly hostile in a very general - non fandom related sense. If I walk into a place with a bunch of people wearing wizarding house t-shirts and pins... I find away to excuse myself and leave.

The money isn't even much a factor anymore. The inner fandom has become so toxic it basically just provides the mechanical structure of an organized hate group while nominally being about the franchise.