In the old days of course there were multiple intermediate sprints, and they once gave a jersey, like you often see in smaller races. And there were the unofficial primes in towns the race passed through, which gave prizes but were not official Tour awards. The progressive sprint-weighting of the maillot vert competition has worked in some respects - Proudhomme was concerned that it wasn't fit for purpose in 2009-10 when points gathered in intermediates was meaning a dominant sprinter was still unable to get the jersey - and the single intermediate sprint is often quite a source of entertainment, but it's generally uncontested by whatever break has escaped and then the battle is for the remaining points from the bunch - I think they were hoping that the péloton would pull back the break so as to compete for the intermediate, but instead they give points a long way down so the bunch settles in behind, only ensuring that the breakaway is small enough that there's still points left for them after the break has gone through, which in turn makes the break more easy to catch.
It's been a long time since we had a metas volantes competition in a GT. It would be interesting to see how it worked as obviously people don't really fight for the Traguardo Volante in the Giro, you don't get podium time or anything out of it. In smaller races a rider will just fight out the breaks on the first day, get the lead in it then protect it either with teammates or going in a second break themselves, but over a 3 week race managing the classification will be much harder, and probably require the same kind of dedication to aggression as when Fabian Wegmann got the Giro KOM in 2004, being in the break of the day on 9 occasions. The other option would be the Intergiro; this would stop the subjectivity of the combativity prize, and incentivise breakaways not just to form but to maximise their time gain.
The best option perhaps would be the Activity classification, like the old Eastern Bloc amateur days. This was a fantastic competition that if I remember rightly classed all summits and sprints equally - you would get 4, 2 and 1 points for the first 3 across intermediate sprints, the same for the first 3 across mountain summits, the same for the first 3 across the line at the end of the day - but this used to come with a bonus point for finishing in a group of 10 or fewer that finished more than 90 seconds ahead of the next group on the road, with an additional point for every 30 seconds thereafter. This not only incentivised moves to collaborate to fight to the finish but also counterattacks as you might not be able to get the péloton to battle through to the finish but by getting into a chasse-patate you could deny points to the riders up the road. It was a combination of a combativity prize and a combinada, which rewarded riders for making the race interesting.
It's been a long time since we had a metas volantes competition in a GT. It would be interesting to see how it worked as obviously people don't really fight for the Traguardo Volante in the Giro, you don't get podium time or anything out of it. In smaller races a rider will just fight out the breaks on the first day, get the lead in it then protect it either with teammates or going in a second break themselves, but over a 3 week race managing the classification will be much harder, and probably require the same kind of dedication to aggression as when Fabian Wegmann got the Giro KOM in 2004, being in the break of the day on 9 occasions. The other option would be the Intergiro; this would stop the subjectivity of the combativity prize, and incentivise breakaways not just to form but to maximise their time gain.
The best option perhaps would be the Activity classification, like the old Eastern Bloc amateur days. This was a fantastic competition that if I remember rightly classed all summits and sprints equally - you would get 4, 2 and 1 points for the first 3 across intermediate sprints, the same for the first 3 across mountain summits, the same for the first 3 across the line at the end of the day - but this used to come with a bonus point for finishing in a group of 10 or fewer that finished more than 90 seconds ahead of the next group on the road, with an additional point for every 30 seconds thereafter. This not only incentivised moves to collaborate to fight to the finish but also counterattacks as you might not be able to get the péloton to battle through to the finish but by getting into a chasse-patate you could deny points to the riders up the road. It was a combination of a combativity prize and a combinada, which rewarded riders for making the race interesting.