As you know, I use just the pics that I took by myself, this is my choice here and also out of here. When I want to write something different, I use to create a funny image using canva.com, but sure, the few (really few) times I had to use an image from other sources (like a pic of an ancient paintings) I always used free images linking the right sources (for example, if you need to use an image on a page of wikipedia, you can read if you can use the image or not and also howw you can use it). My choice is to use just my pics for a simple reason: I earn something posting here, so I want to use just my materials. Sure, I can understand when someone needs to write something different and he/she can't have his/her own pics about that theme (for example if he/she want to talk about the planets or something about IT r others), but ehy, if he/she want just to post a photo of a cat writing how nice is that cat found on google, it's just a trash content. ;)