Certainly. The most important thing in the first stage of any business is selling (a.k.a. getting customers or users) and figuring out the most effective way to do so. Not design, not logos, not getting funding, not adding features, and not even refining and perfecting what you already have. There's no point in polishing a turd or putting it in a fancy suit if you can't figure out how to get any traction for the basic version.