Businesses should be able to be bidders
Businesses should be able to be bidders. Currently you're not able to convert a business to a bidder, but donations could be made and purchases made on behalf of a business for the business which should receive its own tax-deduction receipt for any amount over the value of the item.
Lily Taylor commented
Very important to allow sponsors - who are almost always businesses, and are given advertising and logo placement as such - to be able to enter the sponsorship business/company name and address.