Leading Hotels of the World, an association of luxury-oriented hotels, is offering a free one year membership in their Leaders Club in conjunction with Diners Club International. The membership, which typically costs $150, includes benefits such as complimentary continental breakfast, a free night after every 5 stays, and Sixt Platinum Status. You can register here or by clicking the image below:
As you can see, the benefits are decent:
The email verification seems to only check whether your email address has been associated with a Leaders Club account in the past. The terms and conditions indicate that the offer may have been targeted, but do not mention any requirement to be a Diners Club account holder. I have never had a Diners Club account and I was able to successfully register.
HT: Loyalty Lobby