See https://help.researchgate.net/hc/en-us/articles/14293473316753-Research-Interest-Score for details on how ResearchGate's Research Interest Score is calculated. However, this score does not exist independently from this platform and should not be taken too seriously.
Other scores like the h-index are theoretically independent of any platform, but the derived values are also different because the data are incomplete on all platforms: https://www.researchgate.net/post/Why_citation_score_for_author_publications_looks_different_on_Scopus_research_gate_google_scholar
See also these discussions with general criticism of the scores and with information on their misuse:
The Research Interest Score (RIS) is a metric used on ResearchGate to gauge the impact and engagement of a researcher's work within the scientific community. It combines factors like reads, recommendations, and citations of a researcher's publications, providing a way to track how their work is received and interacted with by other researchers.Credit Scores and Their Impact on Interest Rates
Excellent Credit (750+): Unlocks the best rates across all loan types.
Good Credit (700-749): Offers competitive rates but may lack the absolute lowest options.
Fair Credit (650-699): Results in higher rates, though improvements can lead to better deals.
Ronald C. Kessler of Harvard Medical School (US) has the highest Research Interest Score on RG.