The practice may be sharp, but it is VERY common - mobiles, broadband, VPN etc. with 12/18/24m discount rates - heck they had to legislate to stop it with car insurance! (lol) PS I don't mind it - idiots with money to waste subsidise those like me who treat it as a sport!
I believe it is 15-25 years ago - I went to Kaspersky during that period. Been back on Norton for at least 15 years on everything inc refurb laptops & netbooks without issue.
Or sold by people who wisely would not use the 6m free they get given?
Easier option, don't use any AV & know that you are unprotected. Seriously I wouldn't use McAfee if it were free or they paid me.
Turn it off in your account ;)