If newer versions of Android monetize better for Google, then Google should be paying handset makers a bounty for each of their phones that is upgraded to the l

If newer versions of Android monetize better for Google, then Google should be paying handset makers a bounty for each of their phones that is upgraded to the latest OS to encourage them to push the update. Otherwise it is likely cannibalizing their revenue from selling new phones (or at least they think it will), and they have little motivation to invest in updates.