I see your reports about game crashes after 1-2 matches, we need more info to figure out what's causing it, so quote this message and write
what launcher you're using - steam/xbox/bnet? what tool you use rut or ruavt? if bo6 rut, then unlock or unlock+uav at the same time or only uav from rut key? what game mode - mp/zombies/wz?

Fixed game crashes/freezes when using BO6 RUT

Due to game update both BO6 RUT (Unlock+UAV tools) and RUAVT (standalone UAV tool) are temporarily frozen, we are working on updating it

Upd: RUAVT (BO6 separate UAV tool) has been updated
RUT (BO6 Unlock+UAV Tool) still on update (i.e temporarily disabled)

Both BO6 RUT (Unlock+UAV tools) and RUAVT (standalone UAV tool) have been updated

Due to game update both BO6 RUT (Unlock+UAV tools) and RUAVT (standalone UAV tool) are temporarily frozen, we are working on updating it

Upd: RUAVT (BO6 separate UAV tool) has been updated
RUT (BO6 Unlock+UAV Tool) still on update (i.e temporarily disabled)

Both BO6 RUT (Unlock+UAV tools) and RUAVT (standalone UAV tool) have been updated

The tools may be temporarily unavailable for use (internal server error when you pasting your key/the launcher won't open/nothing happens when you put the key) due to technical problems on www.ovh.ie host side
We are working with their support on fixing it
Sorry for the inconvenience

Upd: Connection issues on the host side have been fixed

Due to game update both BO6 RUT (Unlock+UAV tools) and RUAVT (standalone UAV tool) are temporarily frozen, we are working on updating it

Both BO6 RUT (Unlock+UAV tools) and RUAVT (standalone UAV tool) have been updated

Fixed blue screens when using BO6 RUAVT (standalone UAV tool)

Connection issues on the host side have been fixed, everything is working as usual

Due to game update both BO6 RUT (Unlock+UAV tools) and RUAVT (standalone UAV tool) are temporarily frozen, we are working on updating it

RUAVT (BO6 separate UAV tool) has been updated

RUT (BO6 Unlock+UAV Tool) still on update (i.e temporarily disabled)

Both BO6 RUT (Unlock+UAV tools) and RUAVT (standalone UAV tool) have been updated

Due to game update both BO6 RUT (Unlock+UAV tools) and RUAVT (standalone UAV tool) are temporarily frozen, we are working on updating it

Both BO6 RUT (Unlock+UAV tools) and RUAVT (standalone UAV tool) have been updated

and no, nothing has changed, everything works exactly the same as before, just an update for the current game patch

Due to game update both MWIII RUAVT (UAV tool) and RUT (Unlock tool) are temporarily frozen, we are working on updating it

Upd:
MWIII RUT (Unlock tool) works as usual
MWIII RUAVT (UAV tool) still on update (i.e temporarily disabled)

Both MWIII RUAVT (UAV tool) and RUT (Unlock tool) have been updated

I remind you to run both tools at the same time on MWIII
Load UAV (run the tool and put your key) and wait for cmd to close > then load unlock (run the tool and put your key) > run the game > in lobby inject and activate unlock (F2 and F3) > activate uav (F5)

Due to game update both BO6 RUT (Unlock+UAV tools) and RUAVT (standalone UAV tool) are temporarily frozen, we are working on updating it

Both BO6 RUT (Unlock+UAV tools) and RUAVT (standalone UAV tool) have been updated