Most of the material the company posts is created by readers, who can Photoshop a funny caption onto an image or remix a popular video in minutes and submit it to one of the Cheezburger sites for consideration. The company says that each day it receives more than 18,000 submissions from readers.

Joe Olk, 28, is one of two dozen staff members who spend their days deliberating over exactly what makes something laugh-out-loud worthy.

Skimming through images on a computer monitor in the company’s spacious office in downtown Seattle, Mr. Olk paused over one photograph of a neon sign advertising services described as “Internet Massage.” “Now that is just weird,” he says with a snicker. “But also funny.” And with a click, it is posted online.

Image Books being published by the company that owns the Cheezburger Network, which offers contributors a free book or T-shirt. Credit... Stuart Isett for The New York Times

Employees do not check to see whether the person submitting content actually owns it before they put it on a company site, but they will remove it if they receive a complaint after the fact. The company says that before it puts an image into a book or calendar, it does seek permission from its creator, who might receive a free book or T-shirt.

Submissions that are funny but don’t fit into any of the current blog themes can inspire new blogs. For example, after noticing an influx of photos featuring comically bad knock-off toys and other products, the company decided there were enough to warrant a new site, which is slated to be introduced in the next week or two.

The tricky part, said Kiki Kane, 36, who oversees new site development for the network, is gauging whether an Internet trend has legs. She aims to introduce a new blog every week.