I believe that there are several reasons why Pokemon Bank and Poke Transporter are still for now (no idea when they'll go down) online.
The biggest is simply, it's not Nintendo's decision (alone) to make, it's The Pokemon Company that decides when they go down. Afaik, TPC is basically a 3 way...
Only thing drive me crazy is all these new horror games nowadays is its so dark, all time. I can't even play them. I understand they trying to create spooky but be creative a little, not just darkness with pop out scare scenes.