Of course all Julia users should feel free to ask questions here.
However, the broader issue is that many people install JuliaPro because they expect it to be somehow “better” (like Pro versions of various consumer goods, ranging from digital cameras to kitchen utensils, are usually more durable, versatile, etc).
They may not realize that while the JuliaPro bundle offers various advantages, these come with trade-offs. These include limited community support for JuliaPro-specific problems, simply because not many people are familiar with it or even have it installed.
I understood this reply to @giordano’s point about this being a git issue differently. I don’t think that suggesting that git issues are dealt with here or else “it reflects badly on Julia” is the right approach to these discussions.
Don’t get me wrong, I am happy to see people helping each other with Julia-related git issues here, and frequently try to help out myself. I just think that this is a courtesy (like getting expert help on questions of linear algebra, PDEs, MCMC, etc, which are not strictly related to Julia): it is nice when it happens, but in case it doesn’t, it doesn’t reflect on Julia (the language, or the community).