Sorry, but don’t you think a Bayesian spam filter that trains it’s model on emails with the sole purpose of filtering spam is way different than an Ad profile

Sorry, but don’t you think a Bayesian spam filter that trains it’s model on emails with the sole purpose of filtering spam is way different than an Ad profile that tries to match your personality, can’t be reset, can’t be erased and is exploited for more than what it’s supposed to do (filtering spam)?