Along with Club Log and the Northern California DX Club, DXLab co-sponsors the annual "Cass Awards", which encourage DXpeditions to
work as many unique callsigns as they can:

http://www.cassaward.com/

Here are pictures of Janusz SP9FIH receiving his plaque for the 2019 Single Operator award and the 5K0K team with their plaque for
the 2019 Unlimited award:

http://www.cassaward.com/Janusz_SP9FIH_2019.jpg

http://www.cassaward.com/5K0K_2019_lowres.jpg

73,

Dave, AA6YQ