Why we avoid one blended score
A single blended rating can mislead shoppers if it mixes verified purchase reviews, marketplace feedback, seller ratings, and off-site review profiles. Colorful Vinyl should show source-specific proof instead: Loox as store reviews, eBay and Amazon as marketplace reputation, and any other platform only after verification.
This also keeps SEO markup conservative. Google generally does not want company-controlled sites to mark up self-serving organization review scores for rich results.