It doesn't matter if you used 10x refreshes everyday, or spammed stabilizers, or whatever. It is VERY easy for them to know when a whale/spender/f2p will hit level 50. We are 3 weeks into the game and ppl will be hitting level 72-73, and are STILL not able to clear inferno manually let alone in auto.
I am able to clear all Inferno content with very specific, optimized teams, the only 2 inferno content I haven't done are Aurora (not made a team yet), and Rengokutsu. Yes I use Lily and Ssania, that doesn't mean that this has been designed well. If devs expect people to clear Inferno after a month of farming with 10x refreshes each day and having used up all stabilizers within that month (I'm not gonna calc how many days worth of stamina that could potentially be) then don't make it level 50 and give people a false sense of progression. It doesn't make sense to be able to clear at level 50 only if you have a specific set of units, or have been very lucky on the way to 50 to get a perfect amount of gear.
PS: I've mostly spent this 2x farming Hell IV because I can't be bothered doing manual runs in Inferno and lose extra stamina because of the RNG.