1. is there a limited supply for merit points??
Of course, here are the statistics.
Merit sources
There are 110 merit sources with a total merit generation of up to 33989 sMerit per 30 days
2. how merit points are released to the forum and is there a shedule for it like activity shedule?
Any user can send and receive merit at any time without any time limit, but if you mean about ATM as a merit source, then I think only the merit source and admins know about it. Merit source ATMs will usually be refillable monthly regardless of whether they deplete their sourced supply in a month or not.
3. by whome merit points are released to the forum??
AFAIK, if previously 111 merit sources were appointed to distribute merit, now only 110. I don't know who is missing, but they are contributors that are selectively appointed by the admin.
In addition, there are about 153,881 users (including merit sources) have distributed smerit to other users (219,960 users) with a total merit score of 1,266,669 so far based on merit dashboard. Without exception, if you have sMerit then you can also distribute it to other users.