Completely agree with "proposition 1" - we should make it an ongoing task to earn your signature, and not "buy 1 merit, shitpost for life" as it is now.
That is an interesting approach. Reading your take gave me an idea. What if features like signatures or PM limit removals were able to be purchased on a monthly basis using merit. That would cause a merit burn scenario and would remove the buy 1 merit, shitpost for life issue.
However, moving merit towards the direction of being a currency would likely result in crooked merit sources trying to profit from their position, which should be strongly discouraged.