Officially it is still against the terms, regardless of license type (although there was a period we relaxed this). Selling the account is not any loophole, because selling a container = selling its contents.
It should be noted we define reselling in the strict legal sense: a change in the contracted party. If someone has an idle retail license and shares the key with someone else (or even leases it to them), that would not be reselling by this definition.
The exception would be the internal (partner/datacenter) accounts since those licenses came with specific obligations (operational capacity and bundling requirements). These obligations would not allow the licenses to be shared/leased/etc.
