What does "invisible log-in" mean?

This functionality allows you to log in, but still be shown as offline. This is convenient if you want to browse through other profiles or read your mails in peace without being contacted with the expectation that you will reply immediately.

The Invisible feature is part of the Kaufmich plus membership.

Please note: when you switch to "log in invisibly" while already online, it sometimes takes about 1 minute for this to actually take effect.