Why does merits source takes time to be approved?
First of all, some merit sources are there. They are just not publicly known.
especially that of Icopress
How do you know, if someone is selected or not? Not all merit sources are public. And also: becoming a merit source could also mean, that person would have less merits to distribute, not more (for example: if I would be selected, I would probably lose some merits, because of that).
In general, if you think, that more posts should be merited, then you should make a list of that, and then, those who have more merits, than they can spend, could use your list, to merit something.
Also, let's see, if you can manage to do that correctly. Here are some merits, now I will observe, how you will spend them.
So what about those local board request for merits source does it mean they have enough merits in their local board?
Well, people probably don't have enough merits on their local boards. But honestly, I saw some local boards, and usually, there is not enough posts worth meriting, and that is one of the reasons, why I stick with the global boards. For example: it is normal to see something valuable in the global board, and get it translated, and posted locally. But seeing the other case: someone creating some great local post, and getting it translated into English, is quite rare case.
Usually it's very touching see lots of application on the pending list without responding to them or making a kind of interaction with them to at least make them know why they aren't being approved by now.
The whole point of making some merit sources private, is to prevent some abuse. So, even if after your topic, someone will be approved, then you may never know about it, if that person won't reveal it. And this is tricky, because if you won't tell anyone, then your chances of getting selected are usually higher (not all merit sources created their topics, some of them were just picked without that).
so if someone has so much and doesn't manage to spend it, why not find 5 or 10 exceptional posts every day and reward them with 50 merits each?
Some time ago, I decided to usually send one merit at a time, because in this way, more posts can be merited. If you distribute all of your merits quickly, then you run out of merits, and then, you have a problem, described in the topic. However, if you spend less merits at a time, then you have more merits, for more upcoming valuable posts.
Also, the act of holding merits is generally positive, because it sends a message, that "try harder, if you want to get some merits". If you distribute a lot of merits instead, then some people can get lazy, because they will think, that "who cares, I will get some merits anyway, no matter what content I will post".