Remember that your fans are your lifeblood. See that you know who they are, and give them a reason to follow you. Be sure to thank them, often, for caring enough to support you. They’re responsible for your success just as much as you are.
What we at first deem useless might end up being the next bestseller. It can be the product's novelty, fun factor or sheer stupidity. Whatever the case, just remember there's always room on the market for an original business idea.