Yea probably a reason why there's so few names is because not many people are active in the forum. In order to appear on the list I have to know that the player has super-ascended.
All of these people on the list reported their progress here in this thread, with 4 exceptions: PkmX reported on discord, Fizzer mentioned it on a stream, Zinthos tell me in Warzone Mail, and obviously myself.
I would venture a guess that there's probably roughly 10-100x more people that have SAed at least once than have posted in this thread. It should be possible to scrape every player profile to find whether they have the "SA once" achievement or not, although the player IDs don't seem to be densely packed, so it would take awhile (and Fizzer might ban you for that much traffic).
(0. Get 10x Skip Level) 1. Ascend 2. Sengoku 3. Hardened Far Land 2-3x 4. Hardened Old Town 2-3x 5. Hardened Scandi 2-3x 6. Hardened Rise and Fall of Rome 2-3x 7. Repeat until you’re at 134k
Hardened Old Town is the best level in the game imo
I use SAC on Rise and Fall and get the ‘second’ market first. You can mix in the other levels in between to wait for SAC cooldown to finish before replaying it.
HRome has a very strong cache surf to start, I didn't like it either until I figured it out. Now I strongly prefer HRome to HScandi, HScandi sucks to get started even with full P4 advancements (and has the highest AM requirements). HRome also has lower AM requirements and tons of money.
HOT has by far the lowest AM requirements, but is tightest on money.