This is an ongoing contest/challenge for operators on HamSphere 4.0. The operators get points for any station they work. Scroll down to see the points table. Remote and Activation stations are counted as contacts but these stations are not eligible to participate in the challenge themselves.
Each challenge segment is set between 18.00 UTC to 18.00 UTC next day. Only unique logged call signs per day are calculated. So no need for band hopping :-) Please note that the unique call signs are only counted daily so working the same station another day is fine.