Dropbox seems to have some troubles convincing its users that security is very important. The storage service has been offering two-factor authentication for 3 years now, but since (like with most other services) you need to turn it on manually, most of the company's customers chose to completely ignore it. This is why Dropbox is thinking about offering free storage space as an incentive for those who choose to enable the 2-step authentication feature. This isn't something completely new as Google did the same thing about 4 months ago, when it offered 2GB of free storage space to anyone willing to perform a security check.
For those of you still unfamiliar with the term, two-factor authentication is basically an added security layer. If you choose to turn it on, besides your username and password, you will also need to use something like your fingerprint, voice commands or (most often) your phone number to log into your account. This system is a bit inconvenient as the logging in process takes a bit longer, but it makes it much more difficult for bad guys to take over your account.
While talking about this subject, Patrick Heim, Dropbox's Head of Trust & Security stated: "I want to get the message out we care about our customers, we want this turned on, and not enough people know enough to care. [..] One of the things we’re working on right now is a project we haven’t broadly disclosed yet, but it’s really to incentivize consumers to go through a security health-check both in terms of the authentication settings, the sharing settings, et cetera, and when they complete that, they may get additional free storage space as an incentive."
Source: Venture Beat