I heard Loot Crate only bought 100,000 issues, but your numbers could be more accurate the site doesn't really say.youji itami said:200,000 - 250,000 copies of Rocket Racoon issue 1 were sold to Loot Crate (http://www.lootcrate.com/)
So that's the reason for the surprisingly high numbers.
There was a bit of a flap about it in comic circles with some claiming they were given away free to Loot Crate for promotional use and shouldn't be counted in sales numbers.
Still August's numbers will get the distinction of having one of the highest ever issue to issue drops.
Regardless I hope RR sells well this month as well and continues to do so. Its a solid comic with good writing/art (since when could Young write?) and its nice seeing Cosmic Marvel get more attention.
Now if only we can get someone other than Bendis on the current GOTG run, then we'll be getting somewhere.