The same Dropbox that people wanted to boycott and fled from after Condalisa Rice became a board member. I'd trust Google above Dropbox any day and I don't trust Google enough to actually use Google Drive.
A key difference here is that Dropbox's entire product is storage. Sure, they have some corollary products now -- HelloSign, etc. -- but they're a storage company first.
Google could kill Drive dead tomorrow and it would have effectively zero impact on their bottom line. Conversely, if Dropbox rolled out a change like Google Drive did, it would adversely affect their bottom line, and possibly cause long-term harm to the company, because it would erode trust in their core product.
