Dropbox increased bonus for guest referrals

Great news for Dropbox fans and freebies.
Now each user for each invited referral receives a 500MB bonus instead of the previous 250MB.
Invited also receives their 500Mb.
Moreover, for all previously invited referrals, the bonus was recounted! If not, Dropbox promises to do this in a few days.
Total, inviting 32 people - this is the maximum, you can get 16Gb of free space.

PS I think this is somehow connected with Google and its service Drive. :)