If by multiple article submission you mean distributing one article to many different article sites i.e distributing them then in my experience yes it does work. If on the other hand you are implying submitting the same article more than once to the same sites then of course its not worth risking getting banned. You will benefit from increased back links from distributing one article to many sources and this is a common practice. Surely it is not possible to write individual articles for all sites. I takes a lot of time to write one decent article so it will be a waste to publish it only on one site as readership levels will be low in addition to only one back link..

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