NEM 0 changes on GitHub

According to Trustnodes, Nem is in 14th place in comparison to other blockchains in the number of changes made on GitHub, while Ethereum is 1st.

Otherwise there has been 0 changes made on GitHub, why would that be the reason?

Source from Trustnodes, for further info please go here.

Hard to tell because there is no if no which repositories stats they collecting.