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I am a recluse by choice, so housebound psychologically. I agree with your reasons, they are like my own, but my votes rarely have been worth more than $.01 and I think I even saw the amount received go down by $.02 earlier today so I have not been upvoting except as a way to show support for those posts I enjoy.
I am hoping that this will change because I like giving support to those who I find entertaining, amusing, thought-provoking, and able to expand my knowledge.
Steemit has certainly changed my mind these last 3 weeks.