That's a niche market. Intel has the larger players by the balls. Very few companies are comparison shopping AMD vs Intel.
You say that, but AWS has still launched EC2 instances with both AMD and ARM CPU cores recently. I imagine Amazon buy enough Intel CPUs for them to take notice.
I wonder if the primary driver for buying and offering alternative platforms for EC2 instances was to send Intel a message. "We aren't afraid to go to AMD if you don't make your offering more competitive."
That is not because there is far more demand than they can cope, it was because they had to fulfil Apple's modem order.