Point by point: (1) hard to copy. (2) Could be replaced by a clever algorithm. (3) Not worth much. (4) Valid, but with time can be copied and bettered. I beli

Point by point: (1) hard to copy. (2) Could be replaced by a clever algorithm. (3) Not worth much. (4) Valid, but with time can be copied and bettered. I believe the key here is the audience. Assuming they have some traffic numbers that show virality and repeat visits...but still, 1 mil is as far as I'd go for what is, essentially, an RSS reader sucking up APIs.