It wasn't extra capacity so much as making some of the internal tools publicly available, and it took off.
I believe SQS was the first publicly available service. EC2 was obviously the tipping point and that was a couple of years later.
I believe SQS was the first publicly available service. EC2 was obviously the tipping point and that was a couple of years later.
SQS as the first publicly available service sounds weird to me but I don't have any sources to cite otherwise.
Edit: Wikipedia says SQS was the first service https://en.wikipedia.org/wiki/Amazon_Web_Services#History