I need any Esri representative confirm the following information. How much up-time percentage does Esri guarantees with Esri hosted services such as the World Geocoding, Imagery, and Streets basemap services?
I'd first check if the services you're interested in are covered in the AGO SLA, but if not, you might want to try your question in the ArcGIS Online forum instead where there's likely to me more people who are informed on AGO, this forum is for the Portal for ArcGIS server extension.
