I know for a fact that the fuel company who supply avgas at our place make no profit from selling it, they occassionally break even and most of the tim e make a small loss.
They make all their profit Jet A1 and only supply avgas because the airport company insist that they do so as part of the overall concession.
I suspect that the majority of suppliers at airports are in the same position and that smaller airfields who supply avgas are doing so at cost price &/or possibly only break even.
The profit made by the major suppliers of avgas is minute compared to other products and demand has reduced considerably in the last few years.
Protest as much as you want, it'll make no difference at all other than make suppliers think twice about if it's worth making it at all.