You’re talking about the fee your carrier charges for normal texts. These are “premium” charges, meaning the user is charged an extra fee on their bill regardless of their SMS billing plan.
In Germany the standard price for an SMS is 9 cent, of which somewhere around 2-3 cents are paid to the recipient's carrier. Unlimited plans are common, but only because nobody texts anymore (same applies for phone calls).
Maybe on prepaid plans? Been a while since I've heard of SMS costing anything on subscription plan, outside of roaming charges. Mobile Internet effectively cannibalized that income stream for the phone companies.
wut, the absolutely most ordinary (in the realm of single telecom) text costs me ~6.5 cents