So I was watching iStack Facebook Master Class lesson 1 where the instructor said this. After doing some diggings, it appears to me that many successful affiliates use manual bidding.
Any comments? Guys? Especially super affiliates, I think many newbies like me here will be really interested in what you would say 
I’m doing ecom, had big four figures even five figures a day. I use manual bidding.
Manual bidding will definitely pay off evetually, but it's not that easy to find the sweetest balance.
I'm not running much on FB, but on every other source that I'm on ... it's always manual bidding for me.
I always run on automatic bid, I not tested on manual bidding. Only try manual bidding one time and not recieve clicks.
If I have a auto 0.05 CPC$ campaing and I change the bid to manual 0.01$, What will be happen? I am going to test now
I don't know about Facebook but there are other trafficsources where I run automated bids/campaigns on CPA.
This is a safer and more risk less way of running campaigns but much higher ROI and profit is (for me) always in manual bidding