Your data is worth much more than that, actually.

Proton calculates your data is worth, on average, $700/year. Granted, they have a financial interest in making that number as high as possible, because it's basically an ad for them.

I've read somewhere that data price varies a lot per demographic, with some data being worth just a few $ per year and some other data being worth way more than $1000/y. I can't find the source I read that on, so take it with a grain of salt.

Either way, it's very certainly more than a few cents per year per person.