DDG also seems to exclude some websites from search even if you specifically give terms that should give results for a site. Try searching for any model from Bad Dragon’s website like “bad dragon nova” or another sex toy maker “mr hankeys beefcake” and the first result should be for the item on the maker’s website. I can’t ever get DDG to give results and safe search is already off. It has been like this for years.

Or sometimes they remove a 25% off coupon that usually shows all the time and for the “sale” they just reduce the price of the item to that same amount without and then remove the coupon from the page. It will then look like it has gone on sale from camelcamelcamel because it wasn’t accounting for the price after the coupon it was only showing the item price.