I feel that to be appointed a merit source one of the stipulations should be that you are at the very least a DT1 member. So, it would stand to reason that if you request to be removed as a DT1 member, then you are in effect relinquishing your right to have the roll of merit source assigned to you.
If this is a criteria for Theymos to select merit sources, then you would have been correct when you say if a member stops being DT1 they should also relinquish their merit source position, but i have read the thread
on the requirement if a member wants to be a merit source and theymos didn't stipulate that you must be on DT1 rank to be a merit source, so other than those that said Theymos sent them a personal message to be a source of merit, the requirements for those applying is:
1. Be a somewhat established member.
2. Collect TEN posts written in the last couple of months by other people that have not received nearly enough merit for how good they are, and post quotes for them all in a new Meta thread. The point of this is to demonstrate your ability to give out merit usefully
If Theymos agrees that in his
hidden criteria to be appointed merit source you should be on DT1, then i think many people will agree with you, myself too. In my opinion the only reason why a merit source should be removed is if they are hoarding merits for a long period of time.