I'm pretty sure it would have to be both a 100% conversion rate + prior to the whole cruor->gil nerf, in order for it to possibly convince any merit-full people to stick around.

Nowadays I don't think even 100% conversion would do anything, since we can only get peanuts for our cruor now. 1% would just be a total joke of an addition. You'd get faster cruor by nuking pyxides.