It's because ETH network, not intended delay. They are doing pretty good though!
Already more than 94,451,872.40 USD raised!
Not intended obviously. There were errors along the way and then there were ETH blockchain cloggings recently. And then just hours before the final closing of the ICO, there was a server error that was fixed immediately. There is no big deal with this extension. After all this is not an indefinite or even a week-long extension. Here's the announcement they released:
ICO runs until Ethereum blockchain block 4917092 is reached!!
Approximately Tuesday 4am GMT
ok, this is the fist time when i getting worried about greedyness of Envion team. You got a bunch of negative kudos from me...