I'm quite sure they give away more than 50 MB.
I'm not a freetard. I'd like to pay for their service, and have around 100-200GB synced over several machines. The problem is that their minimum paid plan is too much -- one terabyte.
I've tried Dropbox, OneDrive, Google Drive, iCloud -- OneDrive keeps forgetting some files (and duplicating others), Google Drive asks for my password every few minutes, iCloud does not work across all machines I use. Dropbox works without a problem.
I don't have the resources for a OwnCloud system. I've been using a WD My Cloud sync app, it is working OK so far, but I cannot get it to connect when I'm using some wi-fi networks.