I suspect the huge farmers who have been making thousands or even tens of thousands by abusing bounties and sig campaigns aren't going to give up and let this minimal merit change get in their way and will start either purchasing copper memberships or buying the merit and frittering it between all their alts so it's something we should keep an eye on.
Yes, this was mine concern too, that's why I tried to find any tools to make a list, but seems like this record is not public /yet/.
Actually there is a way, if we scrape the data from the member search list and make our own list, when the number of accounts increases we could possibly compare to the old one and list the new ones, but it won't be as efficient as if we get a access to data dump. I guess @LoyceV can give an advice here too /lets see if piggy tool is working/:)
Here is the link to the search >
https://bitcointalk.org/index.php?action=mlist;sa=search;search=copper;fields=group;start=1