One thing to keep in mind here is "First North American Rights". This is what many U.S. based publications require.
If an image has already been published in North America, then many publications will not buy it for their use. Furthermore, if an image has been published in N. America, and you sell it to a publication that requires first N. American rights, then you can be sued. Not to mention that your relationship with that publisher will be terminated.
This is the reason why it can be very beneficial to fire away at the highest FPS rate your body is capable of. The more keepers of any particular subject at any given time, the more images you will be able to sell.
NOTE: If two images appear to be exactly the same, you will still not be able to sell them both to different publications requiring first N. American rights, even though they are two separate images taken 1/10 of a second apart.
If there is even a very slight difference between the images, then it is normally acceptable to sell each image to different publications, although some publications do have clauses about "similar images".
It's always best to check your contract before offering an image that is very similar to one that has already been sold.
The point is: Firing away rapidly will certainly increase your opportunity for sales.
"Your" and "you're" are different words with completely different meanings - please use the correct one.
"They're", "their", and "there" are different words with completely different meanings - please use the correct one.
"Fare" and "fair" are different words with completely different meanings - please use the correct one. The proper expression is "moot point", NOT "mute point".