With our Sinful XXX discount you will save 50 to 60% off your membership instantly. If you opt for the monthly plan with this deal, your membership fee is cut in half. Instead of $19.95, you pay $9.95 per month. You can however pay less. To do so, select the 1-year plan for $95.40. With this yearlong plan your monthly average cost falls to just $7.95, a savings of 60%.