Typically only a few days if I recall. Why are they not running ads on your DP channel? Did they never respond to you?
I would just look for another Ad Agency, There's another thread recommending Barons, which I recently switched over to. Maybe Roku's getting rid of RAF or putting it on hold & not taking on new channels. I did get set up & was running ads, went about a year & still haven't gotten any payment. I don't think it's a DP thing. more like an RAF issue & switching to SDK might keep you in the same situation.