I'm afraid it's not that easy.
This information is from the first pages of the tiered member lists - country only USA.
Looking at entries with 150 averages ("mobile players"), I find zero Hacks with L0 (the count begins with L1), quite a few Hacks up to L19 and Amateurs up L29 - perhaps, L20 / L30 is the promotor, respectively.
"150" Pros go up to L49, proposing another limit at L50.
Above that., it's becoming difficult.
"150" Tour Pros go up to L92, "150" Masters (sparse) to L95.
There are very few "150" Tour Masters of L93 to L100.
A handful of "150" Legends of L98 to L118.
One TL of L106, and no Champ or TC.
Is it really going all by these numbers?