What about having a championship competition like the F1.
Say we run with the idea ‘label mini mixes’ and we have a points system, like 12 points for winning that week (and getting to choose the next label) 10 for second place, 8 for third, 7 for fourth, down to 1 point for tenth place. Mixes would be private (A, B, C etc with no named entrants), 20 mins long, we wouldn't have judges, just that whoever enters has to vote for the top 10 entries and more votes from others who don’t take part. Tally up the votes, see gets the 10 places each week and have a leader board to see where everyone is standing.
Then there would be weekly winners and at the end of the championship, say 15 weeks / labels, there is an overall winner who has the most points who holds the title of being most versatile. I’m sure at least 10 of us would be interested and if less than 10 entered each week, we just worked down from 12 points to the amount of people who entered. Then it would encourage others to submit a mix
We could run the championship each year.