Why is Amazon using the ULA Atlas V rocket for its latest satellite deployment?

From what I understand, Amazon partnered with ULA because Atlas V has a strong track record of reliable launches. When you’re deploying a large satellite constellation, reliability matters more than cost initially. Amazon also signed multiple launch agreements to avoid delays and ensure faster deployment. SpaceX is a competitor, so relying on ULA and other providers makes strategic sense. This approach helps Amazon build its network faster without depending on a single launch provider.