I love how unique the game (and cool) its gameplay is, there is just one annoyance, with I noticed very fast..
The fees for elevator transport.
I'm not into buying stuff with expiries anyway, I never was though.
I AM (and others probably are too :P) into spending money for a permanent, one-time fee so we can travel every elevator for free instead of having to pay 10 energy.
I don't speak about how much it should cost or so, that's something for the 'marketing team'.
This could work I guess, I could see this as a monthly fee. OR you could simply buy CE for real money and use it on the elevators, kinda seems like that is working and already in place.