The problems is this:
Round 1:
100.000 GB of max 1.000.000 GB distributed for 70.000 btc.
Following rounds:
900.000 GB rest will be distributed for 15.930.000 btc.
Something is very very very wrong.
It's a huge number, indeed, but an important aspect that you're probably missing is that you can use the same BTC balance to participate in several rounds.
There will be many rounds of distribution, more than initially scheduled. I believe it will be a long process, but this will allow more people to participate.