We had this same issue when trying to post (a single) link for our kickstarter to /r/gaming. I messaged the mods pleading my case that we should be able to post just a single link to the KS, but they refused saying my posting history was primarily self-promotional. I guess that's true, but if you actually read what I post, it's nearly 100% free content I'm sharing with the community. Just because I created it doesn't mean it's somehow less valid to receive votes just like any other post. As a long-time redditor I can tell you that this is pretty much what the community has always done before. The censorship from mods is actually a new development, and it's really starting to turn me away from the site.
Later during the Kickstarter, we got a message from one of our backers who had nothing to do with the project beyond being a backer. He said "Hey guys, submitted the project to /r/gaming to help us get more backers!" I thought this was really great that a fan of the project who I didn't know would take the time to submit it for us. I clicked on the reddit post to see how it was doing, only to find this too had been removed. Why this was removed is less clear, it wasn't self-promotion at all, and the only reason I could come up with is that they remembered the name of the project.
This kind of thing never happened in the past, original content used to be encouraged on reddit, and now any time you post something that is even a different redditors original work, it's censored by the mods.
Meanwhile, I posted the link to /r/games. Then this happened: http://www.reddit.com/r/Games/comments/2ebl6f/the_princess_has_been_kidnapped_by_you_nefarious/
The post hit the front page with 857 upvotes with 75% positive. If it had not been for this I don't know that our project would have ever gotten the visibility it needed to get funded. But beyond that, if this was just some self-promotional scam people would see that on their own. They really just don't need protection from mods.
The fact is, there are 10 mods on /r/gaming, and these 10 anonymous people control what over 6 million people see on gaming news. This is particularly interesting during what has been one of the most controversial years in the game community in all of history due to the major events surrounding sexism in the industry. I tweeted this at one of the reddit founders to get his input, but I was met with no response.
I think the reddit party is coming to a close. Where now, folks?