Throwing is a very expenisve hobby for some reason. The cost should be reduced a lot. But adding ammo in any way? I dont agree with this.
I disagree with you here. For dedicated throwers the repair cost is about right. At x1 you're going to loose money quickly.. at x/3 you're going to break even.. at x4/5 you will be making money. (for a standard thrower build/equipment. Obviously you can use low tier items and make money at lower multipliers or wear highest tier gear and loose money at higher multipliers, just like any other class.)
I found this to be the same for my melee characters, archery and X-bow.
Throwing is however a very expensive "gimmick" is you want to have it along with your main melee weapon. But this is how it should be to keep it balanced. You should be paying more if you have a two hero sword and a stack or two of throwing weapons. Or if you have a shield and a 1h weapon along with throwing weapons.
If you are skilled enough and acctually take time to aim your throws then there is enough ammo as far as im concerned(I have a thrower alt I play a lot with). I have seen throwers just randomly running around and just randomly throwing weapons like they dont give a shit from pretty long distances in hopes to get lucky until they run out of ammo, then they come to the forums and complain how they should have more ammo. Seriuslly? Mate if you already threw like 9 things totally randomly at the enemy without aiming and not even hit him once, then I think humanity has failed if they give into your request of giving you more chances on landing easy unplanned hits.
This above wasnt aimed at anybody particular. This is just how some throwers are.
Im just against adding more ammo cause I see what goes on in the field. Most just throw it for lolz and go for luck alone in hopes of hitting something. Not even concentrating or anything. And its still generally a supportclass(sadly ofcourse), cause it only works well if used for a hybridbuild.
TBH I don't see what your issue is? You say a lot of throwers just throw "randomly". So what? That just means their not going to get any kills, it's their fault. They will still just run out of ammo very quickly (again, is 3 more really going to change this?).
Besides, normally I'm very conservative with my ammo (if I do throw a whole stack I keep it close together to pick up the misses). Yet the problem still exists at places such as siege where you're defending and there's a constant wave of enemies charging you down. I always run out of ammo, yet the archers and X-bows who have a side weapon still have plenty of ammo and keep firing long after.