I dont understand?

First this: Code available from another referrer
and now we cant sell runes that are in our inventory anymore

I think you need to have a referrer. I have 4 and I didn't have that problem with any code.
And yes, once you own the rune, you can't sell it. If you get a rune, open a new tab with gamehag and look at the runes description before you even try to do something.

ps:"Mannaz Rune" is a good one. It will give you +40% for daily login during 7 days. This mean that you will get 7 gems instead of 5. 49 gems for 7 seven days(you would get 35 without it).