This indivote discussion keeps on coming back( not a bad thing, but a sign of a vibrant healthy community 
). I think the system is good though not perfect, but the cost of perfection may not be worth it as @Ranjith mentions.
I have seen it evolve over the years. Some months back this was discussed and after that Renie implemented limited number of votes + sharing buttons like twitter etc.
I don't think it is a reciprocal MA System by design, as I regulary vote for lot of people and never get vote back 
and same happens with me, my posts are regularly voted by people whom I don't even know. . It is a human nature to click on posts from folks I know or interact here or on other social platforms, buy hey is that not the purpose of the community to interact? And if I know somebody say Mr. X or Miss Y so what is wrong if I read their post and vote for it if I like it and vice versa. There are times when I do not have a recent post on Indivine but I still check it, and I am sure a lot of you also do the same.
I strongly believe that if I really like a post after reading I will not only vote but I will also share it and I do it whenever I think I want to share a post. That is what actually matters the most from a readership point of view, because not only your fellow blogger read it he/she is also sharing it with his own followers and increasing your readerbase and that in my view is the beauty and utility of Indivine.
Phew! from where did I got all that??
Could have done better if it had been extended
Anyways...no probs! Enjoyed every bit of it
