Alternative wget cron command
Several security plugins like iThemes Security and Bulletproof Security prevent the wget command from running which stops your automated imports with FeedSync and WP All Import.
As mentioned by AITpro in this WordPress support thread for Bulletproof Security:
A safe alternative Cron command line command that is safer to use is lynx -source instead of wget -O. You would simply replace the wget -O command line with lynx -source.