when trying to persuade people to buy something

Yes, that is the point at which it seems particularly odd. Some websites, you might reasonably imagine, don't need to tell outsiders what they are because they're there for a specific set of insiders who already know; but if somebody's trying to sell me something, it surely has to be in their interest to ensure I actually have some idea what it is?

(Unless, I suppose, the item is so dreadful that if I knew what it actually was I wouldn't even consider buying it...)