You can submit as many as you want. The question is will you get any benefit out of article submissions. I think at one time there was some benefit. However, now there is very little benefit with all the updates to the search engine strategies.
jgand
Junior Poster in Training
59 posts since May 2009
Reputation Points: 10
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well i will advise you to do guest posting on your niche blogs it will help you more than article marketing as it has no more worth now.
stunning boy
Junior Poster in Training
70 posts since Jun 2011
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Solved Threads: 5
I think We can added fifty keyword in a week. After that using the fresh content for the best response.
adityaa
Junior Poster in Training
69 posts since Jul 2011
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Infraction Points: 5