A spin auction refers to a large-scale item or service where each bidder pays a certain amount each time he bids. When the auction is complete, the last person to bid wins the item or service. The reserve price refers to a reserve price determined by the seller before the auction begins. If the highest bid price at the end of the auction is higher than the reserve price, the seller must grant the bidder the item or service they bid for.

So, a spin auction reserved means that after the auction ends, the bidder bids higher than the reserve price set by the seller. This means that the seller must sell the item or service being auctioned to the highest bidder.

The rotating auction has been retained. Although the bidders need to pay a certain amount each time they bid, the advantage of this auction method is that it gives participating bidders a high degree of flexibility and opportunities. Bidders can adjust their bids at any time and receive the item or service at the end of the auction. The setting of the reserve price guarantees the price and value of the items or services sold by the seller.

In addition, rotating auctions have been reserved for larger auctions as well. This means sellers can market their products to a wider market and earn greater profits. As a result, bidders have more opportunities to participate in auctions more flexibly and obtain the items or services they want.

Rotary auctions have been widely used in the auction industry and many other industries, such as real estate, automobiles, art, luxury goods, etc. At the same time, spin auctions are also used at charity auctions and charity galas.

In addition, in some e-commerce fields, shopping platforms such as eBay and Amazon also use similar auction methods to promote product sales and attract more buyers. It can be said that spin auctions have been retained not only to bring benefits to consumers, but also to bring better marketing and sales opportunities to sellers.