Update: 2nd batch of 300 complete, I hatched two more shiny pokemon in the second batchJust finished my initial pledged 300.
Hatched 1 shiny moon ball skrelp at egg # 17/300.
I'll pledge another 300.
Total: 600 (3 shiny pokemon obtained)
Moon Ball Skrelp - egg #17, Love Ball Swirlix - egg # 343, Lure ball Clauncher #527
^ Surprisingly lucky lately.
I'll pledge another 300.
Also, since I've been getting inbox messages: I'm a pokemon instagram user, and everyone has been collecting 6th gen rare poke balls. I got all mine from trades since breeding the females passes the pokeball down to the offspring.