It&#x27;s ok as long as you have a plan to make money eventually (i.e. <a href="http:&#x2F;&#x2F;blog.samaltman.com&#x2F;unit-economics" rel="nofollow">http:&#x2F;&#x2F;blog.samaltman.com&#x2F;unit-economics</a>)<p>However, why not charge on day 1?  It sounds like something people should pay for.  And charging always makes it clear if people really like your service or not.