Forcing people to purchase ammo instead of having it refill automatically while draining your cash is awful.
This feature brings nothing positive to the game whatsoever. It's tedious and annoying to be forced to purchase ammo to avoid partial or no refilling during a mission.
Needing to purchase ammo is fine in and of itself as a way to drain $ from the playerbase to avoid massive inflation of marketplace prices. That is all it is good for.
Manually having to buy ammo is an old and terribly outdated game mechanic. It has no place in todays shooters.
Some may argue that "Oh, it doesn't take that long to do", but the amount of time it takes is completely irrelevant. This type of timesink has nothing to do in a modern shooter.
Nobody wants to take time to purchase ammo, if you're playing a shooter you want to shoot people.
