Insiders sell of many reasons, but buy for just one. Not that there is any evidence to support your claim of insider selling since so transactions have been recorded.
Sentiment: Strong Buy
8x8, we are watching you very closely. The poor sobs buying after-hours and thinking they are ahead will just have the rug pulled out first thing in the morning.
I bet the only ones selling all day were the insiders and retail investors will enjoy a huge gap down tomorrow, to boot. Form 4's shoooooould hit within 2-days on the SEC website, if I am not mistaken.