A few thoughts:
1. It is simply not true the that “before the end of last year we almost always had people coordinate 8k auctions so there want more than one running at a time.”
You can go look at the history of auction threads to see this is true, and can also see it by reading the prior thread on this.
2. In my opinion, the only valid reason to support a system of limitations on forum auctions is for some reason that substantially benefits auctions bidders and buyers.
There are words for when a bunch of sellers form an agreement to cooperate, independent of what buyers want: cartel, collusion. There is also a reason why these terms have a negative connotation.
3. Bidders / buyers are showing their preferences by where they bid.
Auctions fail for exactly one reason: bidders did not find the offering interesting of valuable enough.
No one “owes you” your “turn” to run an auction.
No one is preventing you from running an auction whenever you want.
Auctions are not a limited resource that should be divided up among the sellers, for the benefit of the sellers.
Before endorsing a plan of seller collusion please state clearly how buyers benefit from this plan.
4. There are substantial benefits as a buyer for using the same auctioneer over and over:
* combined shipping
* trust based on demonstrated past operating of fair auctions and past fulfillment
* familiarity with bidding procedures and rules - which in the past has caused a lot of hard feelings when a buyer and seller aren’t in alignment
5. There are many different auction formats. Limiting auctions to one at a time presents the risk of stalling auctions in the forum as one with an format that buyers find unappealing drags on, blocking auctions that are more appealing.
6. BE NICE. BE COOL.
Trying to enforce made up rules on other forumites by disparagement, bullying, or treating them worse would not be nice, and would not be cool.
7. Constructive suggestion: if sellers really like this idea, no one is stopping you from:
* forming a completely voluntary, 100% opt in “guild of mono sellers” who agree that among their guild to run only one guild auction at a time, bound by whatever other procedures voluntary guild members adopt
* this guild should have as a core bedrock principle that absolutely no disparagement, bulling, or different treatment of other non-guild sellers, or buyers who bid in other auctions will be tolerated by the guild of any guild members
* this sellers guild could announce their approach and appeal to buyers, rather than trying to enforce their ideas on other sellers
* then buyers can choose whether they like the way members of the guild run things or not
Speaking for myself, I would bid in auctions put up by anyone - guild or not - whose structure met my preferences as a buyer.
Also speaking for myself, I would tend to avoid auctions of sellers who cast aspersions on other auctioneers for failing to behave the way those sellers dictate.