There are 1,000 daily deals every day, so that'd take one day to get as many posts as he has. I think there is more too it. If 10% of his posts make main site which is seems to be around there that's darn good and helpful IMO.
There are only 25 primary daily deals spots.
Almost all of the rest of the deals refresh on Wednesday at 11 AM EST every week.
Posting primary eBay daily deals is like posting Amazon Gold Box, B&H Dealzone etc. IMO
I would agree however, that spotting a "real deal" out of all the rest of the thousand of deals is valuable.