Because SAO mobile games at the time collabed with Persona 5, with Yuuki donning Futaba's costume as seen here. However, this was when "Persona curse" (gacha games collabing with Persona games, usually the fifth game, would ended up going EoS) was still going strong, so Memory Defrag would later got the axe (The other game, Integral Factor, still exists, thus escaping this curse).
