In https://meta.wikimedia.org/w/index.php?title=Technical_Collaboration/Metrics&oldid=17592704#Onboarding_New_Developers we listed 180 devs for Jul-Sep2017, with the source as https://wikimedia.biterg.io/goto/63095b315e9427b0ddf295da7cb3bf26 only displaying "Independent" affiliation and manually excluding some people who are not independent.
Going to that link now, I see 149 developers instead of 180.
Same for Q2/2017: 162 -> 146.
Also, https://wikimedia.biterg.io/goto/53b33800dcd4cdc4551f3fb6d282036e (a KPI) says now "214 changeset submitters" for September 2017, but in early October 2017 the very same query said "242 changeset submitters".
Maybe some affiliation updates in the DB in the meantime, to remove some people who were actually not "Independent"?
Maybe something else?