Can OpenLayers.Layer.OSM (the OSM tile servers) be used in production environment?

Can OpenLayers.Layer.OSM (the OSM tile servers) be used in production environment?

OpenLayers has an OpenStreetMap layer built in:
OpenLayers.Layer.OSM (are the tiles they use from OpenStreetMap servers or somewhere else?)
Can it be used in a production environment in terms of:

suitability (speed, uptime etc.)
licensing   (ability to use it in a paid mapping system) 

Solutions/Answers:

Answer 1:

Yes, the tiles used by OpenLayers.Layer.OSM are the tiles from the official OSM servers and therefore you have to comply with the tile usage policy. Of course you can use any other tiles as long as you comply with their terms of use, or serve your own tiles. There is also a list of paid tile providers.

References