There are cases for people to use communities, the extra reward is one, but also a different set of eyes for different content. Most people would not be interested in account progress reports,

I like having a community where I can share/talk about my account growth, LeoFinance fits that bill for me. It is not like I can post my progress reports in the photography community, or in the writers community, it just would not fit there That is the benefit of communities, people can find a place their content fits.