Someone suggested in a personal email:
Have you thought of adding a function to Aspell, that - when the personal dictionary has grown significantly - sends the user's personal dictionary to the maintainer of the corresponding Aspell dictionary? (if the user allows it)
It would be a very useful service to the dictionary maintainers, and I think most users can see their benefit in it too.
And I replied:
Yes I have considered something like that but not for the personal dictionaries but rather the replacement word list in order to get better test data for http://aspell.sourceforge.net/test/.
The problem is I don't know of a good way to do this since Aspell can also be used as a library. It also is not a real high priority, especially since I would first need to learn how to send email within a C++ program.