At this point, they could add simple double runes for 250-300 fragments each and they would be gobbled up. Give me a Juggernaut rune that gives the same stats at level 10 as both a Burliness 10 and Flintiness 10. I would buy those for 250 fragments a pop simply to free up a rune slot. Let the rune go up to level 12 and I will buy them for 500 fragments a pop.

As the fragments pile up, they become worth less and less to me; supply vs demand, friends. These fragments are nearly worthless to me now (until they release new uses for them).