you get free points for watching, faving, and llama-ing people! i got 30 points off of it, and 200 in all (if i hadn't spent them) also, try dAtrade.deviantart.com - it's basically the same thing! i will also donate -- but although i have 22 points i need to hold 20 of them because i'm participating in an auction ;;
what i usually do is go to watch settings, and i uncheck everything if i don't like their art. also, you can unwatch them -- once you have points they're yours! but you need to comment saying "done" on their profile and wait until you have the points to unwatch them