PBE acc & Normal acc linked?

no.

They are only linked for when you register, so that it can check for eligibility.

If you could do that... then Riot would make no money cause you can literally unlock nearly anything on the PBE for free as they give you RP everyday. Plus there's content on there that isn't on the live servers.

The PBE has gone to total shit anyway. You get 3k (or was it 5k) rp and 5 BE daily now instead on starting with 999999k of both. That ammount refreshes every 24 hours and does not stack.

Now getting free RP every day sounds nice but you have to remember that items in the store are only discounted to 1 BE and remain at full RP price. With that said 3k RP is not a whole lot to work with and painfully slows down the process of getting what you need to actually do your job on the PBE.

With that said the store is not working properly. Loot is disabled for not working properly. Earning BE is disabled. Buying rune pages is disabled. Several champs are disabled, skins were disabled (i think this is at least fixed now)

Now i know its the PBE and its supposed to break often but its never been broken this bad before. Just stick with the regular server.