The policy to not remove anything worked when the forum was small. Now that we have thousands of posts a day, we can't afford 50% of them being junk. The moderators are now instructed to be less tolerant of low-value posts.
Some guidelines:
1. Free speech - you can say anything as long as it is relevant and presented in a calm and polite manner. Swearing, SHOUTING etc. make your post more likely to be removed.
2. No zero value posts or threads, like "SELL SELL SELL"
3. No pointless or uninteresting threads.
4. No referral code spam
5. No NSFW content
Awesome!
One point though; I think that you should remove "uninteresting" since that is completely subjective and there is no way an honest post can avoid it (readers determine interest, not the poster). I think that "pointless" covers it well and is much more objective within the context of a group and easily covers "intentionally uninteresting".