outside of google play, people have been doing this forever. I know of many players who started a second account and basically never leveled up, would not finish daily activities so they never went past 12 or whenever you start getting regular and cantina energy. I don't find this fun or exciting but they would stockpile the energy and wait until they were at a place they were satisfied with to then suddenly start playing the game unlocking the arena with a huge advantage as they are placed in a relatively new shard with the ability to farm, and if desired buy a few bundles to get them started.
I don't really see it as cheating the system or exploiting really its just a whole new level of hoarding. The google play points does make it a bit murky, but they have always released and favored the partnership with android so not surprising. Apple doesn't like to offer incentives, you either play their way or your don't, and they are in a position of not having to care.
(to clarify by not leveling up they would set timers and log in at the energy refresh times, you can't purchase beyond the limit but you can still collect beyond it. there are what 3 regular refreshes, and 1 with cantina? its a long process but.. with discipline and patience I suppose it pays off.)