To save your click, this tool was made to answer this.
When I need people to send me files, I just point them to my dbinbox URL and I see the file pop up in my dropbox as soon as they send it.
Besides that it looks someone claimed your signin page as a username.
If you'd like to implement a better password authentication system, I'd be happy to accept your pull request.
Pull requests welcome!
Also if you can think of a revenue stream that isn't bitcoin donations, I'd like to figure out a way to at least cover the monthly server/bandwidth costs.