The best replacement for adware is spyware.

The best alternatives to adware are rated as following:
★★★★★  spyware
★★★★  pua
★★★★  spybot
★★★  malware
★  ad aware
  spyware remover
  malwarebytes
  spy sweeper
  spy bot

Your alternative for adware is not listed? Suggest!
Speaking about adware, one probably shouldn't forget about tools.

Other search terms related to adware and their ratings are:
★★★★★ tools
★★★★ bearshare
★ kazaa
You have in mind a companion for adware and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of adware in all years. Click on graph for more.
adware
spyware
pua