Correct. AWS gives you 100k credits for 1 year (or some other deal like 25k/year for 2 years). They also have tons of other incentives

* Free support and consulting (probably useful for some less technical companies)

* Free or discounted resources for POCs (ie: "This customer wants to do a 3 month POC, we're going to spend literally 0 dollars on that infrastructure")

* Other misc stuff depending on the org