The rules have nothing to do with trust,
So simple yet so clear. My confusion is now gone. One can give trust or distrust as one likes. But then why are only a few given te power to give trustpoint and not everyone? It is even so that some people who are very much distrusted by others are still given te power to give trust points. Isn't that a bit unfair? In the wild West at least every cowboy could carry a gun to defend himself.
You can buy one if you wish as it's not against the forum rules but certain members will leave you negative for engaging in such behaviour if they deem it appropriate. Everybody starts as a newbie so why don't you just build up your account and reputation like pretty much everyone else did instead of trying to buy it.
Why? Because of the advantages. I can't even participate in signature campaigns?! Poor you. You shouldn't be here just to greedily and eagerly earn from signature campaigns without paying your dues. Most of us here built up our rank and reputation over time and so should you.
It's like saying to someone leaving university to start with cleaning work or sweeping streets. 
This isn't a university, but most people leaving uni don't just go straight into being managers or CEOs or try to buy their way through the ranks. They work their way up by hard work over time.
But I understand that trust has nothing to do with the forum rules but everything with what users think of one another. Correct? Does that also mean that there are no forum rules, no sanctions, and that it's a wild West and anarchy around here?
There are rules. They're stickied in this very sub forum. I suggest you read them. The trust list isn't really moderated and is left up to the community to police so people are free to leave feedback on behaviour they deem appropriate or inappropriate, but yeah, this forum is pretty much the wild west but people should be responsible for their own actions and money and not expect to be baby sat through everything.
I'm not poor for wanting to have a respected account. I'm poor for not having a respected account. For that exposes me to abuse by the powerful ones with green points but no morals. Would this be a proper and fairly moderated forum I could probably agree with your thought of working your way up. But I have the impression that in a wild West forum with a couple of corrupt sherriffs who alone are given guns honesty and a hard working mentality is not enough.