> Bandwidth is expensive and slow to provision.

Not enough to hurt a paid service. Let's say 6Mbps for pretty solid 1080p. And at peak maybe we have .5 streams per account going simultaneously (I bet the real number is significantly lower). So we need 3Mbps per account. How much does a Mbps cost? "Across key cities in the U.S. and Europe, 400 GigE prices range from $0.07 to $0.08 per Mbps."

Peacock doesn't even offer 4K most of the time or on the olympics, but for services that do a $1 upcharge should be more than enough to cover the bandwidth difference.