Very early stages of development? Ooh harsh!
I would say that the current state of SC is what we had as Alpha 3 or 4 in ED. So, yes - early stage.
That still does not mean that Backer42 is right. The plan is that uec is the ingame currency. You earn it by playing or you can buy limited ammounts in the shop. The limit is 25k per day up to a max of total 150k uec. This has been said mutiple times and is FACT.
Additionally i dont know why this would be a logical choice that uec would be a pure real money currency. This would mean that there is no ingame currency, all transactions in the PU with real money? Why should i do trade runs if i can not earn ingame currency? Why should i do bounty's if i cannot get something for it? That makes no sense that uec, the only pu currency is real money only. Earning something is a main progression in such a game. If you remove this there would be no game. Iam really sure that the wise people at cig know that.
In the end i think they will increase the buyable amounts for uec a little bit, but iam very sure (200%) that it will be a ingame currency too.
The limit was already slightly increased to 170k UEC.