GW is a business. They raise their prices how they see if. The adage if you don't like it don't buy it applies.
You can voice your opinion but vote with your dollar. Being a business they need to take care of their shareholders and owe nothing really to the "community" if sales start dropping they will change but outside of that nothing will change.
I doubt they just randomly chose this to increase along with everything else. It could be brexit protection in their pricing or it could be just to meet their sales targets they have internally set. Not being part of the company we can only speculate.
But to reiterate GW owes you nothing... They want to keep your business only because you generate bottom line. They do not care what project you were working on or how much money you have as disposable income. They care about their business and making it successful.