I&#x27;ve seen enough cases of people creating crappy free &quot;replacements&quot; for premium apps or services, and people flocking to them, that I don&#x27;t know if you&#x27;d actually need to fully replicate the data sources. Just find something &quot;good enough&quot; and people will come. Or pay for a little while, planning to &quot;figure out monetization later&quot; and then fail in six months or a year.