It may help to consider the ACBL as the franchiser, and (either for-profit or NFP) districts, units, clubs, directors, and teachers are franchisees at different levels for different objectives, as they so choose, or not. Goal alignment is the key to happy relationships.
Usually club game entries are about half those of regionals so they are not actually the same (dollars and pigments of MPs). I have seen lots and lots of folks keep going to their club games while regionals are happening concurrently in the same town so really the clientele are ...
3♠ acts as a useful cue bid along the lines of HSGT and Western Cue and gives partner the opportunity to bid 3NT or bid 4♣ (forcing), 4♦ non-forcing), etc.
Very nice video indeed capturing the disciplined disappointment of runners-up and the disciplined ecstacy of the winners.
Congratulations to both sides on an excitingly tight final !