If 2 teams were previously banned for using the exploit cypher cam, then you can't blame riot for banning another one for the same thing. And many games have glitches that stay for a long time, it is definitely wrong but it happens. Riot's only fault here was to give Acend the victory, they should just replay the match. and Keyd Stars also knew that it was a exploit, there is no way they didn't know that, the cam went through the goddamned wall. Both Sides are at fault, you shouldn't just blame Riot. Saying that Riot definitely is more to blame than Keyd Stars. IMO the map should just be replayed, if Keyd won yesterday they would still win today.
PS: Both Sides= Riot and Keyd Stars