Several reasons:

-I'm in it since almost the start. I can get every story eventually and it's nice.

-It's translated. Sure i can read japanese, but it is bothersome to fish out every kanji i do not know when i want to read a story and it is troublesome to go to ulmf to read petite's translations every time. It's also simply nice to just get some english at times, really...

-Uncensored art. Yes, this is a thing. I do not masturbate to these pictures, i even just check the art once and go "this was a nice picture" and more often that not press the skip button. However, i still want the damn art to be uncensored because while many types of censoring are not too bad, aigis censoring is among the worst i have seen in size...

-I have spent a fair few coins into it already and i have no intention of wasting that.

-Different units for now.

In the end, i simply still like the nutaku version and it SEEMS like it is starting to shape up. I can be in it from the start and collect tons of girls and aff them. DMM supplies me with any "faster pace" i need and even if nutaku eventually goes up to the same pace i won't mind.

I'm not someone who will simply just abandon my nutaku account unless they start doing something ridiculous that actually hurt me. And unlike many i can't just throw away a year and more of progress on my account. Easy for some, but not for me.

...well that was more than i expected to write.