Freemium models usually have a low percentage of paying accounts, i.e. between 5%-15% paid subscriptions.
Short of polling a random sampling of users we probably have to hear from dropbox for those numbers.
That's sounds high. Isn't it closer to 2-3%?
1-5% is the norm, usually towards the low end
2-3% of 4 million is still very high - about ~100,000. Most of the companies struggle to get even this many free users. Very impressive, dropbox!
Especially for Dropbox since I don't think that their 50 and 100 GB plans are even attractive for most users. At least for me they would have to offer something for $5.