What is the chase figure?

I noticed that people are asking what's the chase figure and what are the difference between chase figure and secret (F5) drop. Chase figure - is placed randomly in regular figure boxes, you don't know whether you got it or not, until you opened the box. In past we had couple of cases, where customers asked to replace chase figures with exactly what they ordered (there are people who don't like surprises), so it's not a trouble for us.

Secret drop - goes up for pre-order at Bambalandstore at random time and out of nowhere, has to be bought separately and is tough to score (or easy, if you are at the right time and fast enough) and involves lots of F5ing, while you are hunting for one.