I'm pretty sure Maxi is saying it's limited to the number of RS accounts it is linked to at one time. For instance you can only run a premium script in 5 tabs or something. Of course this would be 100% up to the script developer to implement. If you feel that a script which utilizes that method is unfair, you don't have to purchase it. Same thing goes with monthly fees on scripts, some people hate that and would prefer just flat-out buying the script.
As far as everything else goes, I'm all for the new method of bringing scripts to the SDN. By no means am I impressed by the method for updating current scripts. It's essentially the same thing as it is now, however over email instead of forums.