set 5BTS as a minimum transfer fee, transfer of BTS, CNY and some other assets need to pay this minimum fee.
transfer of USD and some other assets need to pay $0.2.
to get a regional based fee rule is good idea, as the business cultures in different regions are so different, keeping same may cause the community fall in endless debate and split.
5BTS transfer fee also make the lifetime memeber senseful. in China users hate high fee, but they may pay for lifetime member under 5BTS transfer fee condition. under $0.2 transfer fee condition what they think most may be "should I exit?"
I already paid 10000 BTS for one lifetime member, such a lifetime member price is acceptable, but the high transfer fee may make China users disappointed ans leave, this is what I really worry.