please follow this rules:

 -use only logos, wich agree with the TOS of SecondLife
 -use only logos, with full rights
 -use only logos, with content,
      for example: screenshots from map with no info are not allowed
 -use only LandMarks from the region, how you placed the board
 -dont motivate or ask people to click logos on your board

 (rules can change, if we think we have to do that to protect our customers)