To clarify, I do not need more storage, I already have what I need with Dropbox + Drive (that I already pay for). But I need more storage on Dropbox, because that's my preferred way of handling Cloud storage (having the files on my computer at all times) and I love that Dropbox has been pioneering the field with a great product.
I want to support them, but not at 5x the price of competitors.
Maybe their product is worth the price because the features you just rattled off aren't provided by other companies to a satisfactory degree and therefore Dropbox is 5x better than competitors for you?
GP does raise a valid point though. Most consumers don't pay for a product with cheaper, comparable alternatives just because they are feeling philanthropic.
The fact of the matter is, if Company A doesn't meet their needs but Company B does, they will pay Company B, and no amount of great software, service, and wages for very talented people will change that.