We are aware of the issue with the badge emails resending to everyone, we apologise for the inconvenience - learn more here.
OneDrive is much better than the Dropbox, Onedrive give you Unlimited space with Office 365 for $70 year
Business account for 1 user with unlimited space for small businesses that are only 1 person.
I am a business with just myself running it. I am a photographer who needs the ability to work online from anywhere. Dropbox is the only option to do so. As a photographer, I have an insane amount of things to be backed up and kept online to use at any time. I require much more space then 5 tb (that's literally 2 years of work for me) but I can only get that option now by paying for 3 users. I don't have an issue paying more for unlimited space as obviously that costs more.