The answer to this puzzle http://news.mit.edu/2017/scientists-observe-supermassive-black-hole-infant-universe-1206 may be moving from a closed system of E=Mc2 where c is the velocity of light to an open system where c is the acceleration of light. An open system with unlimited vector spaces would allow the quasar’s mass to grow faster. If anyone has a better answer I look forward to reading about it.