We don't know to how many RTM builds will be limited. If it is limited like - one account - one RTM - than it's clear. If to the specification - you can have more than one RTM at every computer. We'll see.
If clean installs from ISO are a big problem for you - you should stay on official stable versions, really.
its not about trust i think its more like competition....all leak ISOS' pcbeta or osbetaarchive or wzor ..for like i say days ago all is same ... they do same works they have bugs or issues cauze preview...