How Big have to be CEV to compensate bubble situation

[Alex_Rules]

I don't understand why the AT is a fold. As in all MTTs the money is at the FT. Doubling to ~20k gives us a good chance of making the FT and possibly going further. Getting it in at 68% seems worth while when we are giving up the 2 buy in 18th place prize and giving ourselves a chance at the ~50 buy in 1st place prize.