If this is the same dotCloud I used to push to, the real value proposition are the friendliness represented in both the interface and the people behind it offering the most patient customer support a hopeless idiot like myself could wish for.

It's hard to promote that stuff, but dotCloud was far and away the most accessible PaaS at the time - and may still be.

It's not surprising that they're basing their tiers on it. it also looks like the Sandbox is back!