Ah, I see the issue. It's not working for users with as lastvisitDate of 0000-00-00 00:00:00 in the database. Math against that will be far more than 5 years old. This means "But do not send message if it's later than" needs to be set to "And no other date condition" for that to work, but you can't select "And no other date condition" due to validation bug. Will be fixing that bug and in the mean time bypassed the jQuery validation by modifying the DOM so "And no other date condition" could be saved.
This fixed it on my local tests, but your install still isn't adding to the queue. After enabling debug mode and removing &format=raw from the URL the below are thrown.
#6876
Code:
Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 20480 bytes) in /libraries/src/Log/LogEntry.php on line 116
Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 20480 bytes) in /libraries/vendor/joomla/registry/src/Registry.php on line 85
Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 20480 bytes) in /libraries/joomla/database/driver.php on line 2043
Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 32768 bytes) in /components/com_comprofiler/plugin/user/plug_cbpaidsubscriptions/models/table/cbpaidHistory.php on line 1
Your install is hitting memory limits and can't process all those users into the queue. Sending emails has batching capabilities, but queuing emails does not. Have added a feature ticket for this. I don't have a workaround to suggest beyond increase memory limits from 128mb to maybe 256mb.
#6875