Jim Starlin has written for Marvel for about infinity years until last December when he announced he had enough of Tom Brevoort, deciding he would end his Thanos trilogy after just the first volume, Thanos: The Infinity Siblings. Come March, it seemed that Starlin and Marvel were able to put the bad blood behind them as Starlin revealed he would be completing the second volume of the trilogy in Thanos: The Infinity Conflict.
While it would seem that everything is gravy, Marvel didn't send Starlin a copy of Thanos: The Infinity Siblings when it was released, so the writer ordered a copy on Amazon.
The least he could've done is gone down to his local comic shop and picked one up. Or maybe they were all sold out since he didn't pre-order three months in advance.
Hopefully, Marvel can afford to send Starlin a copy of Thanos: The Infinity Conflict after its released in November.