From GSMD

https://themayflowersociety.org/genealogy/mlm-landing-page/

The Mayflower Lineage Match (MLM) program is designed to assist individuals exploring a possible connection to a Mayflower passenger. By submitting information about your ancestry, our team will search our database to determine whether any proven lineages match your family line. If you are exploring Mayflower ancestry and are not yet a member, we welcome your inquiry through the MLM program.

Please note:

• Current members should not use the MLM program to explore additional ancestral lines.  If we know that you are a member and attempt to use the MLM program, as a courtesy we will refund your fee.

• If you are already a member of The Mayflower Society wishing to pursue a supplemental application, please contact your Member Society Historian directly. They can assist you with reviewing and verifying any additional lineage.

Important: To clarify: the MLM service is not included as a benefit of Mayflower membership and is not complimentary for members.