So before in the Collections topic I made I tried to put some images on, but ended up just linking to an Imgur album instead since I got a message about too many images. It seems like the amount you're allowed to put in is really small, which I assume helps out in keeping spammers from going too nuts if they try to add pictures.
Would ten be too much? I can't speak for anyone else, but If I'm looking at a topic where someone's trying to show off how cool something is with images and pictures, I'd rather they just be right in front of me instead of need to click a link to elsewhere.