We are aware of the issue with the badge emails resending to everyone, we apologise for the inconvenience - learn more here.
Dropbox business, o dont need a package for 3 users, can i have more space in dropbox without a business account?
Even though not currently the best alternative out there...try Amazon Drive...it's been working for me. And they have been making considerable improvements in a short amoutn of time. About to transfer multiple family dropbox accounts over to Amazon Drive. With a 1 TB limit, I'm forced to archive files on an external hard drive I'd rather not do and don't have to do with Amazon Drive.