I wonder what effect niche sites have had on eBay’s bottom line. I bought my last 3 phones on Swappa and just spent a few hundred dollars buying vinyl on disco

I wonder what effect niche sites have had on eBay’s bottom line. I bought my last 3 phones on Swappa and just spent a few hundred dollars buying vinyl on discogs. Did not even consider eBay for these purposes, and perhaps that is true for many shoppers across many niches.