Why Did Fifth Harmony Get Rid of Jack & Jack as Tour Openers?

Fifth Harmony doled out some pretty exciting news this morning, unveiling that soulful songstress JoJo is going to open for their 7/27 Tour. But if you remember, 5H had previously announced that Vine-famous rap duo Jack & Jack and songwriter Victoria Monet were going out on the trek. Harmonizers seem to think that they got Jack & Jack fired.