Yeah those are some of my favorites. Nosleep is the most popular, there's also letsnotmeet, shortscarystories, and twosentencehorror which is probably the lowest quality of the bunch. I'm sure there are even more if you look around. Many will have related subreddits listed in their sidebar. Some of it is shit, some of it is wonderful. Try sorting from top > all time.
Search all of your hobbies/interests on reddit and you will find plenty of places to subscribe to. It's a big website, all you have to do is learn to navigate. You can also go on r/random for a random subreddit when you're really bored and/or stoned.
You can move money from amazon payments to your bank account. In fact you need your banking information to sign up in the first place. Reddit is also a good place to learn about that, if you search mturk you should find the important subreddits. Don't fall under the guise that you'll be making $12 an hour or anything like that. You have to dedicate some time and learning in to it in order to make more money just like a real job. You'll be making very little for a while until you have a good enough reputation for higher and higher paying hits.