I'll try to explain my own reasoning. While "good" may not be the epitome of eloquence on my part, it could in this case be viewed similarly to the subjective manner in which one might say "That music sounds good", or a proposal that "sounds good" because it achieves something I perceive as in my favor. As a privacy advocate, I resent the collection and exploitation of my personal activities and communications, regardless of TOS, etc. I also don't view people as units of profit or as something to exploit to my advantage through non-cooperative means. I find it very strange that so many are willing to accept from strangers, agencies and corporations what they would aggressively protest from an individual. For myself, the unauthorized collection and use of what I prefer to remain private is, regardless of legalese, intrusive and bothersome. The difficulties involved in avoiding this bother are formidable, and in some ways overwhelming. If I can passively convolute the acquisition of this data, it is "good" because it hinders something hostile to my sense of well being. I should clarify that I don't believe that such data is used exclusively for marketing.
Regarding the sentence you found difficult to complete, I'll try:
"I hurl all this garbage at Google and now I'm better off because...." I am impeding something that I protest. I have no reason to believe that such collected data will be used responsibly, nor am I convinced that if it was, it would be innocuous. Just as I don't want my every thought read aloud, neither do I want my every curiosity, concern or inquiry. To the best of my observations, we are not living in a utopia where altruism and goodwill take precedence over profit and personal interests. Our society scarcely has affordable healthcare. Our society is still a brutal one, where such brutality is often administered based not on one's character, but on their finances. America has a thriving private prison industry with a startling portion of inmates incarcerated for victimless crimes. America freely engages in highly dubious wars that cost many innocent lives. The world is still a work in progress. I believe we all have a lot of work to do on our selves as individuals and a species, and before making careers out of furtively siphoning personal data from our fellow citizens for purposes of exploitation, we ought look in the mirror a bit longer. I don't think that's Google's (nor their partners'/clients') plan, despite the ostensibly "good" things they do. I do not believe humanity has evolved through the virtue of smartphones and petroleum to suddenly within one generation have permanently excoriated the dictators and tyrants of the world from itself. Whether I am in error or not, this data is connected to that which is personal to me, therefore if I can confuse it, it is good.