“2 euro/month” is what you pay directly out of pocket. Your taxes pay the rest.
The same goes for landing rockets on the moon. You pay from your taxes.
I can't be absolutely sure, but I don't think this is true. This company [1] I'm paying 2euro/month to, AFAIK is not subsidized and never was. They already spread fiber and cable long before we joined EU (in 2007) and I had this 2euro plan since 2006.