Like & Match
You only see matches when there is an actual match, thus a like from both sides. In order to turn this like into a match you must like them too. There will be no matches if you do not like any of the people that liked you.

People who liked you will appear random but with priority on the wall.

Secret Match
This widget shows you a couple members, of who one has liked you. Select the right person and it will be a match.

Wink
In contrast, you can send a wink to show direct interest in another member, who can see the wink.