According to the reading, Gu$,$ X$.,$ Kannan, P$.$ K$.,$ & Ma$,$ L$.(2019,$ March $20).$

How companies can get the most out of a freemium business model

$.$ Harvard Business Review, how does a firm implement Versioning strategy in the Software$-$as$-$a$-$Service $($SaaS$)$ space?