As designers have recently asked me about remote blind play testing, here are two such services that you can use to improve your game and/or your written rules.
The Game Krackers
You can also reach them via Facebook:
Shadowsong Industries
https://www.facebook.com/ShadowsongIndustries
Shadowsong offers remote blind play testing with analytics.
You can also reach them via kivafecteau at gmail dot com