I find most apps are pretty binary. Either they are high bandwidth (like video and backups) or not. If you use 1TB there is a good chance you will use 2TB.
This will certainly make it less likely for the low bandwidth users to get a surprise bill but if you're doing video $85 per TB will get expensive fast. You better make sure your business model can make a profit at those prices. But even then, if the average user pays you $20 a month and only streams 100GB of video you make money but you'd make more money outside of AWS.
It's almost as if AWS wants to active discourage those use cases.