Correct. In fact for most people it's probably both faster and cheaper, going by my Googling of Dropbox's prices. I just don't have the sort of use profile such services were intended for. E.g. I do things like mount /home over NFS from multiple machines, and that's not something I want to do at anything less than local speeds, even if my files would fit in whatever the highest tier plan is. (which they don't)

(I also run my own DNS, a VPN bridge between my home and a couple family members, and several other unnecessary but interesting things. I'm in IT; it's just what I do. The file server referenced above is actually going to be a homemade SAN if I have my way.)