Hello,
Crystal chip sales and pack (?) of 10/50/100/(1000) crystal chips were a gPotato offer.
When we merged with TR players, and get the new runes fusion method of calculation, packs were removed from the game, as TR players didn't have this offer (that's what the rumor says, never played on TR servers). If i'm not wrong, RU players also didn't have this kind of pack.
So i'm very pessimistic about the return of any crystal chip sale as we had in the past.
Note : this is not an official answer, just what i think.