Why Tarkov players keep a second account for cheats
A main profile takes years to build: finished quests, trader reputation, a stash packed with gear, an edition paid for long ago. Losing that over a single unlucky raid hurts enough that plenty of players never launch private software on their main at all, and they are right not to. The routine instead is simple: take a second account, run raids on it, and once it is gone buy the next one for 250 roubles.
Your main stays clear
The ban lands on the throwaway. The stash, the played wipes and the edition you paid for on your own profile are never in the line of fire.
A testing ground
A new build is worth trying before it goes anywhere valuable: how it draws, whether it drops you out of raid, how it behaves on your system.
The cost of losing one
An account lives anywhere from a few days to several wipes, depending only on how loud you play. A replacement costs about as much as two days of a subscription.