I find it weird that so many people are surprised by the insane traffic causing the site to crash - iPhone releases, game releases, random software roll outs, a myriad of exclusive sales all end up this way or worse. If anyone's ever played Everquest and Diablo II or more recently World of Warcraft/Diablo III every time a new patch (or expansion more so) is out the servers die out for hours, lag is colossal, everything runs awfully for the longest time and Blizzard (now owned by an even bigger company, Activision) is worth around 15 billion USD. I don't know how much Massdrop is worth but I can hardly blame them for not being prepared for this when hardly any businesses ever are (or have the means to be).
It is annoying though and I feel for everyone that's left out, look out for the drop being reopened.