Those helper springs are so soft though
You can compress them fully by hand...

I think they are mainly to keep the springs trapped, however the suspension shop told me they also disipate some energy so it doesn't skip over bumps etc
Don't know how accurate that is... but I guess if you go over a big bump and the suspension gets unloaded, the heavy spring would compress the soft spring rather than the shock having to do all the work

Any ideas from anyone?