Statistics says there no big income difference between 1 and 3. One-cent scheme is only for westerners, which is not valid in less affluent areas.
Currently there is no difference between 1 and 3 BTS because nobody is doing such small transfers while the transfer fee is at 30 BTS.
This will change as micro-transactions kick in and it can have a significant impact on our revenue.
It's really good that you've done this analysis but we must not rely on it blindly because this data describes the current state, not the future state when we have the percentage-based fees in place and users change their behavior accordingly.
Better to start a bit high (and possibly lower the fees in the future) than start low and upset people with a fee rise.
Micro-transactions include almost 0 value transactions not for money transfer purpose but for information transfer purpose, such as messaging. Most of them may send 0.0001 BTS with the minimum fee. In terms of this, 1 vs 3 BTS makes very big difference to their costs; 300% increase. Can you imagine how many demands will decrease due to the 300% more cost? The minimum fee is
not a source of income but a tool for preventing spam. Currently, the smallest fee is 1 BTS (for account update and call order update, excepting publish feed), and it seems to work in terms of spam prevention.