many similar games have 2-3 free energy refills at specific times of the day to motivate people to log in.
MSF has a energy cap of 120 and you can refill 80 of them for free at 12.00, 18.00 and 21.00 daily. this is a pretty smart way to engage the players to play more. not sure, why lotb doesn't have this, it would be a very welcomed feature, that should benefit devs and players.
aside this i posted it a while back, but an energy cap of 80 is crap and stressfull. 100 or 120 would be a great qol improvement. especially since the newer content needs much more sot than the early day level.