I've been thinking about an idea for running competition on the hub. Rather than competitions for players, my thoughts are competitions for maps.
The basic idea is an elimination style playoff for maps, whereby players can actively choose their favourite maps to keep in the competition. Each day, two maps are played, the map with the most votes (or matches played on?) progresses to the next stage of the competition.
This would allow for players to keep maps they like on the rotation for as long as possible throughout the competition, and would hopefully allow for mappers to get new insightful feedback on their maps. Rather than the usual "I like/dislike this map for this reason" I feel that it would introduce a more unique style of feedback, such as:
"one of the reasons I chose de_grind over de_breach is due to it's unique style of Mid, which allows for each round to introduce various different playing styles, whereas i do not feel de_breach has its own uniqueness" as an example. It would allow players to judge maps compared to others.
This could even be introduced to old operation maps, which would allow people to play old maps they haven't played in years and would be unable to play otherwise. I feel that this may also introduce many more players to the hub.