Note: I am a fastly customer, reasonably happy.
They don't really matter, to be honest.
If anything, they give insight into the growth of companies, showing how many key players use them. Fastly goes down and you're like damn, all these people using Fastly... I had no idea.
In the end, the views may balance out, or even the "I'll make a quick buck shorting / buying on bad news" sentiment may actually raise the price.
(In other words, if "everyone knows" where the price will move today, the price won't move unless something is really affected long-term)
When some internal document leaks that reveals "internal struggles" or some master plan, akin to the Panama Papers. The problem is, the Panama Papers are just about forgotten today.
If the Fed fund rates were 2% or 5%, FSLY and AKAM would look very differently.