Those changes of maintainers need to be synced to package distribution sites like npm.js or Debian packages and put in context with versions/releases.
In Europe this was introduced for banks after the banking crisis. If a bank does any organizational change, a report is sent out to all member states of the EU right away and any of the 27 national bank agencies can check if they notice something unusual. It might be possible to bribe a few people in your own country, but it’s really hard to bribe all responsible people in 26 other countries.