The database size could be greatly decreased by saving visit for each target as a daily count and by having a second table that saves the count for each referrer.
Saving each and every visit as a separate entry is a bit overkill.
I would also recommend to show the default 14 days setting a bit more prominent on the plugin page. That information is easy to miss.
It seems I have the same problem.
Logged in via steam and got redirected back to my page. So far so good but get_current_user_id() still returns 0.
Using WordPress 4.7.2, maybe that is the issue?
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This reply was modified 3 years, 11 months ago by tajin.