Puzzlers are prompted to solve a series of successive image grid captchas with odd items to ID (e.g. select every Texan, or every Nobel Laureate). If a puzzler gets a captcha grid wrong, they are sent back to the first grid. There are six captcha grids total, and after solving them, the puzzler is presented with a fake text captcha. Regardless of what the solver types into the text captcha, they will be sent back to the first captcha grid, but now they are prompted to select a different set of photos out of the same image grid. Each of the six captchas is used three times in fact, with solutions presented here:

Texans	Professional Football Players	Browns
Germans	Composers	Philosophers
Boy Band Members	Wilsons	SNL Hosts
Dogs	Robots	Teddies
Nobel Laureates	People With Elements Named After Them	People With Erdos Number < 3
Gary Oldman	Oscar Winners	People With Bacon Number 2

There are three text captchas, one after each pass through the image grid.

If you overlay these images, you get the following:

This message is encouraging puzzlers to do the same thing with the captcha grids that they did with the text captcha—take the union for a message. If puzzlers look at every cell they clicked across the 3 passes over the 6 grids, they will notice the cells spell out 3×5 letters. They spell PAPERS, which is the answer to this puzzle.