I stumbled upon a glitch in 1.0.2 (does not seem to work on 1.1.0) to obtain endless free #1 slugger picks but it costs 600-900 gold. I found that if you go to homerun battles then sluggers then scroll to bottom and hit get sluggers (seems to only work getting the slugger purchase this way not direct). Open a #1 slugger pick after it picks open another with the button at the bottom. After the second one opens, the button should changes from purchase to open and you can keep opening #1 sluggers for free. I've done this up to 1000 opens at a time (works on my iPad, iPhone and Nox emulators) and have been using it to load up on EXP since opening sluggers gives bonus EXP.
A couple things of note, this seems to be a glitch and it doesn't always work the first time I try it, if after the first try again pick it doesn't change to Open I have to go back to Games screen and start over. It can cost up to 1200 gold in my experience to trigger the glitch. Also, once you X out of the open pick screen you will have 1 free Open left but once that is opened it will ask for gold again like it is supposed to. To trigger the glitch again you would need to restart the process by going back to the game screen again.
https://vid.me/PeJW