Wow! I considered dropping Dropbox in January, when my Pro subscription was up for renewal, but I didn't - mainly because I was just too damn lazy. Now it looks like a good non-move I didn't make!
Just received an email message from Dropbox saying they have doubled my plan, from 50GB storage to 100GB, for the same price. Which is just fine by me! I imagine that this is their "answer" to the recent challenges raised by Google Drive and Microsoft SkyDrive. (BTW, I have 25GB free storage with SkyDrive because I had an existing account when they changed their plans!)
I may just have to rethink how much I use Amazon S3 now.