Present study theoretically explores and empirically diagnoses the Phenomenon of Plenty - paradox of below-potential economic performance of nations generously endowed with natural resources, focusing on oil-rich CIS members: Russia, Azerbaijan, and Kazakhstan. Extending theoretical structure to proposed Four-Component Process it reports existence of direct de-servisation finding previously overlooked cause of oil paradox - downturn of non-tradable sector long-time lacking production forces. Application of elaborated 5-Sign Algorithm for Diagnosis of the Phenomenon of Plenty elicits its presence across evaluated nations.