Rotating 12-speed SRAM GX chain I have a new mountain bike with an SRAM GX 12-speed drivetrain. I am thinking about rotating the chain to make maintenance easier and to increase the lifetime of the cassette. I would swap between two chains every 250 km or something.

But the chain comes with an SRAM PowerLock.  SRAM advertises these links as a one-time use link. This makes me think that I have to use a new PowerLock every time I am swapping between the chains. This cost would make it less desirable for me. But they are cheap, so it is surmountable.

So my question is: How can I rotate chains on an SRAM GX-12?

Is it worth using a new PowerLock every time?
It is not officially recommended to reuse single use master chain links, but in reality everyone re-closes them all the time (even roadies, I read somewhere). The worst that can happen is that the life span of the master link will decrease after reuse, but you were about to throw it anyway ending its lifespan. Carry a spare new one with you so that you can replace it in an (unlikely) event of breaking. Just don't sue the manufacturer in that case.

If stakes are high and you are in some serious competition, obviously you don't want a mechanical problem; otherwise, you should be prepared for on-trail repairs anyway.

The last thing: do not carry old master links over to a new chain. if you throw away a chain, its master links go away with it.