Cloudflare has been ramping up a now years long campaign to (finally and rightfully) draw attention to the ridiculous bandwidth costs for AWS with their Bandwidth Alliance and now R2. Say what you want about Cloudflare (disclosure: I'm a happy customer) but this campaign is a substantial benefit for any consumer of cloud services whether you use Cloudflare or not.
My contention, as I've commented here before, is that AWS is taking advantage of a new "cloud native" generation of developers, startup founders, C-suite, etc who have never purchased bandwidth/transit, run an AS (autonomous system), etc. As mentioned in the twitter thread Amazon is essentially charging 1998 prices for bandwidth. I wouldn't be surprised at all if many of their services are essentially loss-leaders and Amazon more than makes up for it with their ridiculous markup on bandwidth.
This "cloud native" generation can wrap their heads around instances, request rates, storage volume, K8s, containers, functions, etc but the pricing on bandwidth is very nebulous, notoriously difficult to estimate/control, and poorly understood. Without organizational experience and knowledge of the real bandwidth costs in 2021 the assumption is likely "well, that's just what bandwidth costs".