I explained how the spread parameter helps to spread award shares more broadly across more blogs, in this December 10 post. Then on December 16 I implemented it, setting spread = 4 for all communities on votermedia.org except UBC AMS, whom I needed to consult since they are funding their votermedia ballot.
When UBC AMS reactivated funding for their ballot on February 1, I outlined in this post their plans for setting their spread parameter to 4 on February 8, and raising it to 8 on February 15.
Concurrent with UBC AMS, yesterday I also increased the spread parameter from 4 to 8 on all votermedia.org communities. The impact is not dramatic, but would be felt more in cases where one blog has a very large share, say above 50%.
You can see the effects of these changes on each community's "horserace" page, which shows the daily history of award shares. It's linked below each ballot.