To advertise something lucrative, only to find the product you get is substandard
Most literally Qatar advertising the Q-Suites for business class flights, only for the customer to find that they will be in the old substandard business class cabin.
Someone who is addicted to obtaining money and building wealth. A money addict and fanatic. Breadheads often work more than one full-time job, and some even participate in illicit activities to "obtain the bread".