I'm not sure if a suggestion has been made regarding the number to post at a time. On the whole, if you set it to only post 1 at a time, there is the risk of it falling behind and never catching up which may not be particularly useful then. Once it catches up, it will only be posting new entries; if it's posting 5+ in a 2 hour window, getting only 1 every 2 hours would very likely have it being perpetually behind.