The text of the original post is a direct copy-paste from EA Sports' Madden NFL website. So yes, the writing here is "biased towards Madden" because it came from the horse's mouth, so-to-speak.
The rule was implemented after the Madden NFL 10 development cycle - during its release and support phase. This was a time when Ian Cummings, Phil Frazier, Donny Moore, etc. were regular posters on this forum, and there was an unprecedented level of interaction between developers and fans without any middle-man
PR guy, blog editor, or whatnot mediating the conversation. Madden NFL 10, though a tremendous step forward for the series, wasn't a perfect game, and many voiced constructive criticism about it. However, there were also those who voiced their opinions of the game less constructively, instead posting far more negative thoughts about the game, the staff who made it, EA Sports, and so on. The sheer volume of personal attacks, slanders, and blasphemies about the game and towards the developers themselves frankly were uncalled for, and it rightly drove away every one of the EA Sports developers who posted here. Few of the OS posters who were targeted by the new rule prohibiting attacks on developers exhibited any decency, restraint, or ability to voice any criticism of the game in a constructive and useful manner, and they deserved the punishments handed to them. The policy is not unreasonable as a one-strike policy keeps the boards clean from trouble. The rules of OS are further easy to abide by; I've been here since 2002 without issue.
Related, EA Sports isn't in the pocket of Operation Sports. This accusation has come up since the NFL 2K days, and it's been denied every time. The two have an obvious working relationship - EA Sports provides exclusive video game media to Operation Sports such as news, previews, screenshots, videos, and review build access in exchange for publishing of that information to the site, which drives web traffic and ergo advertising revenue to Operation Sports. Consequently, the content posted provides word-of-mouth advertising for the EA Sports product in question. It's never been a direct monetary relationship, however. Why would EA Sports give OS any monetary support whatsoever when the company has its own website and forum to drive traffic to?