Once upon a time you used to be able to gain interest, however the feature was being abused by some members and it has since been indefinitely disabled.
For now IMO it's just good to put bells in your ABD so that you an resist spending it if you need it for something else.
Or you can forget about it, find it, then feel good about yourself.
Once upon a time you used to be able to gain interest, however the feature was being abused by some members and it has since been indefinitely disabled.