The way these kinds of fonts work is that you don't host the font, they do. You link the font licence you purchased through your HTML code (or CSS, depending on how the foundry recommends you to apply the font) with a specific font URL that they provide you, which will contain unique identifiers. Then they can track how often the font gets loaded.
If your site really kicks off and you max out those visits per month (that they track on their end), they either start charging you the higher tier, cut off loading your font, or send you stern emails.
There is no expectation that you share your analytics with a type foundry.