Looks like the downgrade is not doing the intended damage to the stock price
William Blair may have alterior motives but there is enough stealth buying happening and the price is staying reasonably strong after such a massive runup in recent weeks. Market is weak today and with a downgrade this stock is only down 40 cents. Stock is strong and I still feel this could touch $75 by end of the year.
That is why they decided to reiterate his negative outlook. He really wants this to go down, there is no other reason to publish the article again when the shares went up anyway. I hope investors are onto his game and don't play into it, giving him his glory and most likely his success at lowering the share price. Look at Amazon PE and going higher.