strpos(): Non-string needles … in Notices.php

While investigating a We’ve noticed that emails are being sent from the following unverified email addresses notice which turned out to be Contact Form 7 sending blank emails, I found this in the logs:

PHP Deprecated: strpos(): Non-string needles will be interpreted as strings in the future. Use an explicit chr() call to preserve the current behavior in /path/to/wp-content/plugins/wp-ses/classes/Notices.php on line 380

I think it means you should offer discounted rates for the full version of WP SES to users who report issues. They’ll get free/cheap the first year, then will be tied in as customers for life. Seems like a no brainer.