When someone gives well reply and gets impressed with their effort but you are out of merits or zero merits in account. What is the better solution in this situation? I've noted few replies from member on my old post that they must deserves to get merited.
There's no time limit when you see a post that is good and doesn't have merits to give or send. You can send merits sooner or later when you have merits or post it in a thread where you can submit it to the thread where you can submit good post that didn't get merited and check if it is indeed merit worthy. If you aren't aware, there's a thread before (I don't know if it's still active or still going on) which I myself submitted the links of a post in there that deserves a merit. There is also a thread by filippone if you have a post that deserves a merit.