You don't know what the costs are though. The site could have huge costs of content acquisition or any number of reasons to not be making anywhere near $20 million profit.

Revenue isn't the same as Earnings Before Salaries either.

E.g. maybe it's an e-wholesaler or widget reseller, bought $19M goods and sold $20M. Or maybe it was much slower than expected, they actually bought $25M goods and are burning 500k/month on warehousing. Or whatever.

Yes, but the parent is saying this could be an e-commerce website, or construction company, etc. But having an iOS app feels unnecessary for most of these businesses

The engineering team might be 3 people but not the whole company.