Maybe there is something to soaking up a market (RSS) then dropping it (though it seems the ball is being somewhat picked up there), But, maybe unlike walmart?, there is little reason to believe that was malicious. People (Kevin Rose, for example) were making fun of RSS being super dead in 2011. I am no expert, but I doubt it is a google plus play as much as a twitter defeat. Note: I personally love RSS, but if I was not a tech news junkie, it might be of little use to me.