This poll is a spectacular example of selection bias, and the uselessness of polls. There's not a chance in hell that 20% of active Dropbox users have stopped using it, even among tech circles.
I would be amazed if even 20% knew about this in the first place, and amazed if as much as 1/10 of those people truly stopped using Dropbox.
No one is claiming that this is a scientific poll. You'd have to be naive to assume that the results could be generalized to the population at large. That doesn't mean this poll is useless.
I would be amazed if even 20% knew about this in the first place, and amazed if as much as 1/10 of those people truly stopped using Dropbox.