The concept is explained much better in the link, but TLDR: People are trying to organize and crowdfund the purchase of spirit airlines assets with the goal of running it as a worker owned business similar to winco or rei. Seems at least tangentially relevant to this community
From reading their website, it seems like they are advocating for a consumer cooperative rather than a worker cooperative, with the main difference being the consumers get voting rights as opposed to the workers, which is a very important distinction.
For public facing companies I kind of prefer this tbh. It also makes sense from a raising funds perspective (more owners to pay in). Employees should have voting rights and Coop or not, the union needs to exist to protect their interest too