The offical follow up from Ritz:

"Dear rsilver

Thank you for your message and for your interest in The Ritz-Carlton.

With regard to your question, rather than participating in a frequency or
reward program, our focus is on guest recognition. Our efforts revolve
around providing personalized service to loyal guests based upon their
personal preferences and needs. You are included in the process by virtue
of your being a repeat guest as opposed to being a "member".

We look forward to welcoming you in the near future and please do not
hesitate to let me know if I may be of further assistance.

Regards,
Lauren Rotchford"