Free lifetime membership to HotelSlash, accessible through a special promo code "FREE4LIFE". HotelSlash provides exclusive, deeply discounted rates on over one million hotels globally, allowing users to book either prepaid or pay-at-property. The membership promises additional benefits like tracking existing hotel bookings and alerting members to cheaper available rates. No credit card information is required to sign up for this membership.

HotelSlash is a hypothetical service or platform that could potentially offer a unique way to book accommodations.