The ODP lists sites with unique content, the more unique the better. Price isn't considered by us to be a unique factor - price comparison sites abound and they do that particular job far better than we could ever do. It is the content, the products, the background information, etc. etc. that creates the uniqueness we look for. If someone doesn't have information about shipping and payment then we might consider the omission quite serious (are they actually an online shop?) but its presence is usually just an essential element of any credible online seller not something to make a judgement on the detail of.
If you had your own exclusive range of lingerie designed for you and no-one else then that would be unique, something that people could not find elsewhere, and that might get completely submerged in a search engine - so a directory is the best tool for people to find that unique product. If someone wants a particular generic item - a stock camisole sold by 1000 online retailers then their best approach is to use (a) a search engine and (b) a price comparison site to narrow down their choice of supplier. Not a directory as we don't spider and record the individual pages of product.
Ignore the figures - they are for easy mathematics only. Say Seller 1 to Seller 1000 retail a standard set of items. In your case that set is substantially less than at least one other who had a much wider range including the ones you sell. We only need to list one of the sites, the one with the biggest range, say 500 items, so people know these goods are available on the Internet. If someone is interested then they can use search engines and price comparison sites to get the best deal on a particular item.
Sellers 1001 - 1050 retail original items, maybe on average 50 items each, they have designed and had manufactured for their exclusive sale. Those are all good additions for us because the items are not available on any other website.
In 51 listings our users therefore have access to 3000 different items - the 3000 different items that actually contribute 99% of the world's entire range of different products in that category. Now what is easier for an Internet surfer - 500,000 hits on a search engine spread over 25,000 pages with the top results being from the ones with the biggest marketing pot and only 500 different products turning up in the first 100 pages - or one page where you know that each and every site you click on will contain something different and present you with all 3000 different products available globally.
You may think that as a consumer you want the choice of supplier not product. That's fine but then ODP is not the tool for you to use when surfing for that choice - use search engines and price comparison sites instead. When it comes to online shopping
our users are interested in choice of product not supplier. That is why people use us as opposed to a search engine. The likes of Google recognise the different needs of consumers. They provide a search engine for one, and use our data to provide the alternative approach for the other. But they are separate functions within Google - evidence that it is simply not possible at present to combine the two differing needs.
excluding them hurts not only the business being excluded
That isn't true and it isn't a factor in any case were it to be true. We don't serve the businesses - others do like Yahoo and Overture but not us. We don't try and replicate what a search engine and price comparison site can do, that would be impossible since we are human-edited with no spidering technology. You pay nothing to suggest a site, nothing to have a site reviewed, nothing to have it listed, nothing to have it stay listed, and there is therefore nothing lost should the site be rejected. If it is accepted it might be a small bonus but realistically it won't affect your sales, at least not to the extent that could be achieved by investing the same effort into search engine promotion instead. Where you might consider it a positive to be listed is in what happens when other parties take up our data but we have no control or influence on that and it doesn't figure in our decision-making process. If you consider you could get a higher Google PR if listed and by not being listed you are being damaged then lobby Google to adjust their PR algorithms not us to change our concepts.