1. About 50%-50%

2. Since my app target is developers, their goals look basically same. But some users are designers, directors, etc. Japanese tend to tweet their thoughts on Twitter and English speakers tend to post their thoughts on our forum or to email me. In a nutshell, Japanese make indirect reactions on social media and English speakers tell me directly.

3. Those who have too many suggestions usually quit using my app soon in my experience because their problems are different from mine. You don't have to please everyone.