How does this work for me as a user? If I pay Google contributor $1 a month, do I see any ads at all in participating sites? Or do I only get a limited number o

How does this work for me as a user? If I pay Google contributor $1 a month, do I see any ads at all in participating sites? Or do I only get a limited number of impressions ad-free, to encourage me to increase my spending? How does this work for publishers? Do they get paid a fixed amount per impression? Is it proportional to the time spent on the website? Does the website benefit from having higher spenders visit their website?