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Probably to stop you voting for 600,000. :)

Sure but why not just 1 witness. 30 seams like alot to vote on.

It's probably just down to the fact they need that many and it just gives you a bigger choice if you think 30 people are deserving of it. A lot of people probably don't vote either. I mean I have only done 1 vote.

thers that "probably" again, I had several "probabilities" for why, just interested in the answer behind, why 30!?
does you vote count the same if you vote for 30 or for 1, will the votes give the same "power" ?
There is a reason for everything (not always a good one tho)