A "ganzaaa" is when Busse offers a few (or rarely many) knives on a first-come-first-served basis, either at a predesignated time or upon posting a "go" thread. Whoever gets their emails in first after the start time gets the knives. In many cases, there might be several of a particular model available.
Each ganzaaa typically gets its own name, line the 2019 CupidGanzaaa around Valentines day, VeteransDayGanzaaas, etc. As far as I know, this is the first time the CrabShackGanzaaa name has been used.
The "Crab Shack" is where Busse keeps its special handle makers. These are the guys who can turn a pine cone or a piece of wood a milkweed pod into a work of art. So we can expect custom shop knives with unusual to unique handles. And since it's going to be a miniscule ganzaaa, there won't be many knives available, and they'll probably all be gone within a few seconds, or minutes at the longest. But you won't know if you got one until a day or so later after Amy-0 has a chance to go through the emails and determine who scored and who didn't.
As an example, here's the thread with the prices and procedures from the 2019 CupidGanzaaa:
https://www.bladeforums.com/threads...ednesday-feb-20-2019-9-00-pm-eastern.1643926/
Sometimes, the knives aren't completed at the time the Ganzaaa is held, and it might take a few weeks for the knives to ship. I expect for this one, the knives will all be premade and ship pretty quickly.