It is wise to stick with your choices long enough to see how they work. After you research your potential affiliate programs and services for your business and actually join them then dig in. You need to give them a chance because there are many factors that determine speed of success, etc., that are not even related to the actual program.
This can be the economy/consumer confidence, world affairs, the seasons and even the weather that affect all sales businesses to one degree or another either off or online. So this is one reason you don’t want to ‘fly off the handle’ if you don’t see results right off. (Not to mention to consider how much action you are actually taking consistently to promote your business since this is the main factor).
With that said as you build your business you should also be on the lookout for new opportunities to add to your portfolio of income streams. Some may be better than others in the long run so you want to have a few things going on not only to compare results but to determine which programs are keepers and which ones don’t have enough substance.
Remember though you can even make money in the short-term on those that don’t have much substance strictly because they are the new ‘fad’ and you will have the benefit of earning some commissions just by virtue of everyone wanting to see what is going on with the new program (if it is being promoted sufficiently).
You may find at first when a program launches that they put all their resources into heavy advertising, marketing, and holding online meetings, etc. to get people acquainted and excited. Naturally not many small businesses can keep up the volume due to costs for a long period, so that is when you may kind of see a slow-down in response as a result. Hopefully you will move into a steady stream from there and you can sustain your business.
In any case the idea is to give things a fair chance for as long as you can. Look at your own stats and reviews (with a grain of salt) and see what the world is saying. On the other hand if after several months you see nothing in spite of your efforts, etc., then maybe it is time to drop it and look for a new opportunity to replace it. The point is change is always necessary and good one way or the other unless you have found a goldmine you can depend on.