For years, studios have been trying to figure out to monetize the internet. As more people are watching shows online, companies want to get some money for that content. That has led to Hulu, streaming episodes with ads, etc. I just recently got this residual check from my appearance on Criminal Mindslast season which shows that some money is being made online.
Now, granted mine was only a one-day co-star, but as you can see, it doesn't seem like anyone will soon be getting rich by their exposure on the ol' interwebs. Still, a check is a check!