A few years ago Dropbox just stopped working for the basic thing it is supposed to do -- let me access lots of files without taking up tons of local drive space. Since then I have not stopped using/paying, but i have stopped counting on it and I have stopped adding new files to it, sharing files with it, etc.
The constant marketing for "dropbox for business" (which is priced badly and is not something I've ever felt comfortable recommending to any business) was also quite irritating.
It’s funny that you think Dropbox is supposed to let you access lots of files without taking up tons of local drive space. I still think of Dropbox as a file synchronization tool, so taking up tons of local drive space is an expected behavior. It goes to show that people think of Dropbox in different ways.