Where can I get royalty free images Reddit?
It's allowed because Reddit is a public forum and the answers he takes from there are not protectex by copyright as he's transforming the content enough for it to be fair use.
Are images on Reddit free to use?
17. Can I take an image from Google search? You cannot download or use images from Google without seeking permission from the copyright holder, unless your use falls within one of the exceptions or the work is distributed under an open licence such as Creative Commons.