These laws in the EU countries that apply them are usually stating that the compensation has to be reasonable in regards to the salary the employee is normally

These laws in the EU countries that apply them are usually stating that the compensation has to be reasonable in regards to the salary the employee is normally getting and the potential loss of money created by the non-compete close so no, one dollar won't work. Also the non-compete clause need to actually protect some company knowledge, a non-compete clause on a bus driver will never be enforceable, regardless on how much extra the company pays.