I created a python 3 command line program that can incrementally increase a Beeminder goal rate over long periods of time. Instructions for running the program on windows 10 can be found from this YouTube walk through:
The program can be downloaded from here:
One use case would be if you wanted to start out with a goal of one push up a day, then add one more push up per day each week until reaching 300 push ups per day. The first week you would do 1 push each day. The second week you would do 2 push ups every day. The third week you would do 3 push ups per day. This pattern would continue until reaching 300 push ups per day.