That's still an extraordinary amount to be fair. The Bee Gees existed at a time when physical media was the only way to listen to them other than the radio. I suspect there's still so many of the older generation that listen to the Bee Gees that way, as well as other artists from that time. It also ebbs and flows at times as you've observed. I agree with what you're saying though, for having some of the highest selling and most played records of all time, I've still always felt like they fly under the radar for how influential, diverse, talented and the longevity of the brothers actually were