Same here. Playing different browser games already sucks out a lot of time from you.
In a sense I have 2 FKG accounts as well (DMM and Nutaku - being the older one), and I stick around for Nutaku just coz I wasted more money on it than I would have now (not a whale, but a dolphin you could say.) so I dont wanna just drop it, unless they really do F. up.
Plus its not a clone 1:1 for Nutaku DMM, since DMM has completely different wibe and how it does things, and as such there are differences.
But yeah, I dont understand why would someone start an alt, unless he does it for fun or trying to get the 1st 6* and just re-rolls over and over again.