Many legendary members do not receive more merits than lower rank members, in my opinion.
About this, I think Imamusma has answered you.
This led me to believe that they had attained the highest rank and didn't require merit to move up. They can contribute whenever they want or not, and even provide detailed answers to questions that deserve to be answered. They only comment when they feel it is necessary and add to their post count, which is especially important for signature campaigns.
Regarding ranks and merit, only members below Legendary would still need merit to rank up where the required requirement was up to 1000. For the rest, you'll probably know that every merit they get is an award they receive for contribution and the quality of their useful posts. But I think you already understand that.
What Im curious about is that only a few legendary guys are always active in the forum and providing lasting solutions to questions posed in the forum. Others that are active only post to complete their signature posts. Does that imply that after getting to legendary rank, making posts or comments to be merited is not necessary again?
Some Legendary might care about the amount of merit they get, it's some kind of race or just fun. But honestly, I don't think they will post for merit even though some of them want to get it
[non-merit source] to distribute to other users. However, they also need to maintain the quality of their posts even if they've rank up to Legendary. I've reported a lot of bad quality Legendary posts, that means even Legendary should still care about post quality.
I remember a post I talked about this, But a lot of high ranked members comes against me, they felt I was being disrespectful, personal I've seen a lot of low quality post from high rank members, but they all agreed that I was wrong, just few people have different opinions, but I'm glad, I'm not the only one who has observed this on the forum.