I just ran into this issue last week with a client. I used WP Control delete 60k cron jobs from Lead Connector. They did not come back and the site has been fine. However, another client today had some speed issues and I saw Lead Connector was installed. I found the same issue with 50k cron jobs and everytime I delete them, they come right back within seconds. I completely deleted Lead Finder as the client does not use the CRM it was connected to. Even thought it is deleted, that cron job is still showing in the events. I am guessing those are the old ones from March 24th which seems to be when a lot of this started for people. Our hosting company also tried to delete these and cant. Now the cleint site is down. Any advice?