I'm thinking about getting into youth sports photography in my area and I was putting together a hypothetical product list and I was wondering what the more experienced pros in this area think about selling low-res digital prints. I know that most people are very protective of full-res digital copies (understandably!), but I think there's also a segment of the market that isn't interested in buying digital copies to print, but to post on Facebook, Instagram, etc. Is it common practice to sell low-res versions that aren't suitable for printing but are perfectly fine for Facebook? I don't see it discussed much (maybe I'm not searching the right terms), so is there some obvious pitfall I'm missing?