It's pretty easy to make 1 or 2 if you like stopping by and answering or commenting, 5 is not too hard either but you have to come a bit too often, it will be noticed in your family, definitely. Those lucky months when you happen to be around many questions and not too many people are online to answer, you can get to 10. To have guaranteed 10 and shot at $15 you will need to treat it as a job.
It's ok if you are frequently stuck on public transportation and it's even a bonus if you want to avoid chitchat, but you are better off collecting bottles around your neighborhood, it would yield more money in shorter time, you'll get some tan and vitamin d and make some cat friends
To know what to do to get it with the minimal effort is not possible, formula is secret, keeps changing (from what I heard, improving to keep focus on quality of help as opposed to reward) and has subjective part to it. Basically the more helpful you are, if you are also decent and not overly aggressive the better your standing will be
