Well for Google Drive you pay almost $30 annually for extra 25GB space. $10 per year for 20GB if you use SkyDrive. Plus both Google Drive and SkyDrive support online doc editing. So yes it is really too much for paying $10/month for 100GB space which I may not use fully for foreseeable future.

> Are you saying $10/mo is too much for how much you use Dropbox?

Yes, I think 8$/mo are too much for storing 9GB of data. Because I can pay 2$/mo for the "same" thing on Google Drive or 0$/mo for git-annex-assistant on the VPS I already pay for.

Dropbox still works better than both solutions, doesn't require giving even more info to Google and takes much less hassle to setup than git-annex-assistant but I don't think it's worth the 4x premium.