thank you for looking into this and bumping me up one level. Yes, the word “Forum” as navigation link text came to my mind as well
While I do see your point in preventing new users from spamming the forum (has happened in the old forums) I see no difference in one or five links to products which are supposed to enlarge your manly bits or are about to infect your computer with well written software for sinister use cases. Those kind of posts still need to be taken care of.
The advantage of tightly restricting images is unclear to me. Maybe DDoS the server with numerous uploads? Normally users are encouraged to post well written and example ridden questions to make it easy to follow their question and being able to reproduce their problem. I think I can hear @pwessel bite into his keyboard halfway around the globe every time a user posts a question without image or example code.
Therefore I still support a (slightly) higher limit for links and images for first time posters. Five looks good to me but is chosen arbitrary. Be kind to Paul and think of his dentist bill …
Thank you for the link to the Discourse Trust Levels and mentioning StackOverflow. While the system is great and very much needed for very large forums I think the GMT community is way smaller and a bit more relaxed than the trenches of StackOverflow et al. In this light maybe you and the others can decide upon easing the restrictions for first time posters a bit.
Please take this as an input to the discussion as it is in no way meant to be against you or the rules written by the Gurus.
All the best,