No more not https offers if you have any

[Graybeard]

no-referrer-when-downgrade

policy of Chrome and now Firefox will not send the referrer information after the parent domain and extension from HTTPS -> HTTP now. /?|gone|

So, if you have any offers that are not https:// (few if none now?)
those will not be tracked
How Chrome’s new referrer policy affects your site analytics
Firefox 87 trims HTTP Referrers by default to protect user privacy – Mozilla Security Blog