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It's incentivizing quality rather than quantity.

So what happens to "the quality post" that a user comes across after up-voting multiple articles in a single day, so in other words post "Z" is worthless just because that post was posted after "A, B, and C".. Im not really sure that would be indicative of a post that is not high quality.. I think this method is a bit flawed, but that is just my opinion

MattClarke ~ I would have to agree with you .. this would be a "disincentive to constantly engage with the platform", this policy needs to change if steemit wants to look for quality content over quantity..