Good for you that you're really enthusiastic about Firefox usage, that's not my point. My point is that it's quite empty and valueless to dismiss a product like the VPN because you're afraid it might go away despite its apparent quality.
You did say you've never even glanced at the VPN for that reason, and given that Mozilla is apparently refocusing its efforts on paid products like those, an army of users who won't even glance at their products regardless of quality is increasingly useless. Especially if Mozilla experiments with potentially great products, which involves killing bad ones, quite frustrating to see a "will it be there in 6 months" attitude kill any apparent interest.
Edit: not sure it'd help, but an analogy might be: imagine I told you I care deeply about chicken dishes, chicken is my favorite, I choose what to eat based on whether they have chicken, I'm a chicken warrior! You make a high quality chicken dish, and then I say "it looks great, if I ate it I'll probably enjoy it, but I can't even try it. What if you drop it on the floor while serving it to me? What if the dog eats it while I'm digging in?". Would you think my complaint is sincere? I don't know, I've evidently spent too much time pointlessly arguing about this.
I do support them with product choices, and also with thousands of hours of my time as a web developer over the years, always fighting to support Firefox in the projects I worked on, even when the product owners could not have cared less or were openly hostile to the idea of spending any time whatsoever supporting something that wasn't IE6 or Chrome.
I will not ship web-facing code that doesn't support Firefox.
I'm no special talent, but god damn. I'm not a friend of Firefox - I'm a warrior fighting for them in the trenches every day.Hope someday I have "enemies" who spend a few thousand hours in the trenches for me over two decades and also throw money my way. Wouldn't mind an army of those.
If it makes you feel any better, I'll probably support their VPN product too eventually if it actually survives their terminal ADHD.