Thanks for visiting!  Check out some of my newer writings for New Media Advisors:

https://www.newmediaadvisors.com/lifetime-value-vs-roi-which-marketing-metric-should-you-use/

https://www.newmediaadvisors.com/lifetime-value-vs-roi-which-marketing-metric-should-you-use/

I will be sharing more thoughts there if you're interested!