Fascinating site. Thanks for linking. However note if you change to "open router" pricing in some cases even B200 which is ~2y old has negative margin (and AFAIK ppl are using longer amortization than 2y - I do not know how cost are calculated here though).
1. The link is for rented infra. That means the inference provider doesnt have to worry about deprecation.
2. Newer gen nvidia gpu's like GB300 are way more profitable.