Sour Grapes?

I was saddened today, researching poetry magazines, to find one that emblazons complaints about how one of the biggest and most respected poetry competitions is run, on their home page.

Their complaint seems to be that the competition organisers do not list the names of every single reader.

OK... they may not agree, and may decide to do things differently themselves. But I wonder if the slightly nasty post was prompted at all by sour grapes?