This is a complete misinterpretation of the concept. The only economy of scale that matters in software is that (in theory, barring certain scaling considerations which are in any case becoming more abstracted out thanks to IaaS) the same program can be run to support 10s of millions of users. Each additional unit costs very little to produce (serve it up via a CDN, some amount of network calls, processing and data storage over the lifetime of a user).