As sources travel through their lifecycle, they will show up here until they are presented on the front page as "done".
These are sources that have been edited at least one and are fairly polished. They may have a couple rough edges but are only waiting for that final polish.
Beta readers get credits in the back of the novel for reading and giving feedback.
Rougher than beta, alpha sources are ones that have been written but haven’t gone through a third-party editor. This means they will be rough but they are “feature complete” in that the characters and plots are pretty much set.
Alpha readers also get an entry in the credits.