Now, the next question would how hard is it to earn those $1000 per month? It depends
Before asking, do a search... if you don't find the answer, then ask The purpose of this forum is to help others in the community, that's why it's called Sitepoint and not Linkpoint. SP Guidelines - No fluff.
If I knew exactly how I would go out and do it myself... But it's definitely possible, as others have said, with the right strategy, product and marketing investment. But it all depends on what product or service one chooses... there's no abstract template for all situations...
Its hard to make $1000 a month off one affiliate program. Yes you can do it but it will take alot of work on your end like getting the right kind of traffic to your site that will turn into sales. The best way to make over $1000 a month is to get into many Affiliate programs and work hard on them an don't give up. You might get a couple programs you make $50 a month on and you might have a few you make $100 plus a month on. If you get into enough of them you should earn $1000 a month but it takes time.