The rating system is semi-automatic. There are thresholds for things like "length of time established", "length of time accredited". Those may change without notice since these are based on dates in the database. Also at the end of each month I review the "
meister points" which are determined on how participative the rep is, are they posting special promos, are they helpful in the forum, are they responding quickly to PMs, emails, queries, etc.? How are the complaints coming? Are there any? Have we met in the past year? How have they been dealing with players and affiliates? Some casinos like 32red are pretty much maxing out in this area.
You should notice that a number of casinos' points decreased as well.
As for why the scores are not corrected on the main index page, I have to do this manually, and on weekends I'm in the yard pulling weeds or something to that effect.
And just a quick chime-in on MGS exclusive casinos. I spoke with MGS's CEO last February, and even though MGS runs a fairly tight ship (as opposed to Playtech, RTG, etc.,), if some multi-platform casino were to start screwing over players, they wouldn't be able to do much. MGS has more pull and influence over their exclusive licensees. It doesn't happen all that often, but every once in a blue moon - I am compelled to contact a software provider informing them of a rogue operation or practice. This is a reason MGS casinos get a little boost in the rating system which is displayed
here.