If you have uploaded at least a third of what you have downloaded, since you started the program, you will have unlimited download speed. This is true also for modem users and other low bandwidth users. However, if you have uploaded less than that, compared to your downloads, downloads will slow down a little, to reach balance of 1:3. Please note that uploads to friend slots are not included in the upload sum, so you shouldn't exclusively upload to friends all the time if you are also downloading at the same time.
Session ratio may be useful if there are times when you can't upload fast (daytime), and other times you are able to upload at full speed (nighttime). By uploading at max speed during the night you may be able to build up a large enough amount of uploaded data, so that you keep within the allowed ratio even during the day when you are uploading slower.
TransferRatioBalance rewards never shutting down eMule, and to upload as fast as possible (whenever possible, even if not always). Both these things are good for the network.
Please post questions about this feature in this thread.
This post has been edited by zz: 15 September 2006 - 10:02 PM