Amazon Market Stream does not send messages every hour

[leoangel]

I am using SQS to receive the ams sp-conversion dataset, and I have noticed that I don't receive messages every hour. However, the sp-traffic dataset sends me messages every hour。
The official document say that "Data will be delivered to your queue in a burst every hour. It may not necessarily be at the top of the hour, but it will be delivered once per hour."

[kdwivedi13]

Why You Don't Receive SP-Conversion Messages Every Hour
Amazon Marketing Stream only sends data when actual events occur. For SP-conversion data:

• Messages are sent only when conversions happen for your campaigns within an hour
• Conversion events occur less frequently than traffic events (clicks/impressions)
• If no conversions occur in a given hour, no message will be sent

For more information, please review our detailed Amazon Marketing Stream FAQ Page.