Except your spending habits aren't announced. If you only refer one person ever - then yes, you'll know how much your friend is spending roughly, but you'll also be getting a prize because of it so I don't think anyone will speak up about it.

This is a really standard perk in the industry that Subeta is in (and gaming in general) to reward you for bringing friends who are also going to support the site.

I've seen the suggestion for making it monthly but I like the instant gratification aspect. And if you've still only refered one person you're going to know how much that person spent at the end of that month anyway, I don't think it actually solves the problem.

Because this is specifically for people referred spending money :) When you refer someone and we just gave you 500csc there was no strings attached, it was just 500csc being added to the system. This is added to the system on top of an actual purchase.