alt Hacker NewsThe difference is that early-bird pricing is transparent and predictable. There is a written, known policy of $X discount during specific hours. You can plan for it. It's never a surprise.
Dynamic pricing means sometimes you go there, and Wendy's decides on the fly whether you get a lower price and how much. It gives Wendy's the option to pinch pennies how they see fit for their own benefit, rather than offering a deal which you can choose to accept.
I can't tell if you're implying that Wendy's was going to offer different prices to different customers "on the fly", but that wasn't the case.
It was store-wide with updated prices shown clearly. Yes it could change on a daily basis, but you would also expect it to be roughly predictable because the whole point is to get more people to come in when it's cheaper.
Saying that Wendy's is "pinching pennies" doesn't make any sense.