AWS Marketplace SNS Notifications

I believe they mention both SNS and SQS to exploit a fan-out pattern: https://docs.aws.amazon.com/sns/latest/dg/sns-common-scenarios.html.

In that way you can scale large amounts of events.

You are correct though, you can also try to leverage SNS topic and subscribe to an endpoint: https://docs.aws.amazon.com/sns/latest/dg/sns-http-https-endpoint-as-subscriber.html as first step, and then fallback to fanout if you get into scalability and performance issues

Thanks for the answer, Antonio.

But I'm not asking for the standard SNS topics. Mentioned AWS marketplace topics are provided to seller during product creation, and it says that we are not the owners of these topics, only we can subscribe to them, and it only mentions SQS, not any other type of endpoint. Is it possible to subscribe HTTPs endpoint to these specific AWS marketplace topics?

I've found another question regarding this matter, here on re:POST (https://repost.aws/questions/QUdc6YAINxS8qKVzrfMcI1Mg/aws-marketplace-saas-product-integration-testing-sns-subscriptions). This guy is interested in subscribing to these topics using Lambda functions, but the support says it is not possible, due to the fact that we are not owners of these topics (AWS is).

Thanks!