Out of 1500 DNA matches, none are more distant than estimated 5th cousin (15 Centimorgans). Do 23andMe have a 15 Centimorgan cutoff, or a cutoff of the number of matches that is limiting how many relatives I'm seeing?
I suspect you are seeing what is described at While You Were Sleeping: 23andMe Disrupts DNA Relatives:
23andMe has tightened their DNA Relatives cap, reducing the maximum number of accessible DNA matches from 2000 to 1500, without directly notifying all customers. While in previous years, customers could overcome the 2000-match limit by sending all of one’s genetic relatives invitations to connect, 23andMe has made the new hard and fast 1500-match cap almost insurmountable.