I will complete the top bar with my contact list, (as we can see Block list as well). Generally speaking, in my contact list will enter all players with 10 or most games played with me. For that condition, should be essential that the player have not been before in block list. I will comment candidates, and reason, and I will do because we cannot share in Playok who are in our contact list.
Other concern about Contact list, is the fact that some players often belive that they have right to make cheats when they are in my contact list. They think that I will not analyze the games, or they have 100% my trust. But indeed, they will be warned about that. In this point, helps that I could communicate with them through the Playok email system.
So, broadly, 10 games would be enough to enter in my contact list. The games will be 100 if the player resigned one game or have been blocked before. The games may raise to 20-50 if the player have one anonymous nick (actually I never play with anonymous nicks) or have not personal information in his profile. One photo should be usual. Age and country I think that would be at least, necessary for any player.
As a last, if the player doesn't write or resign, the games may raise between 20-50. Players who are suspects of being cheaters, may also need 20 games to be in my contact list. In any case, contact list doesn't means nothing, only it's useful for me, to see what kind of players might be "fair-players", because I have not doubts about his game style.