I don't see how you can come to the conclusion that the system is not useful when you do not use it. We find it useful to see when a member was reminded of a particular rule and, if it needs to be done again, whether they ought to be aware of that. If the last time they were told was back in 2010, chances are they just need a gentle reminder. If they were reminded last week, something more permanent may be necessary.
The points system doesn't have a line over which you get an automatic ban or suspension as that would be too inflexible. The rules state, for example, that some behaviour which might be tolerated from a long standing member will earn a new user an automatic ban. In the past, it was also possible that someone might not have seen the PM which was issued with the increase in ponts, so it was followed up quickly by a second. It would be quite wrong in those circumstances for the second one to push them over the line to an automatic suspension or ban.
Second point is that nobody pays to use these forums.
Each member is responsible for thie own behaviour on the forum and should moderate their own approach to others. A member with warning points did something to earn them, and can see exactly what it was. Think of them as battle scars. Paying for a subscription on Autosport+ does not entitle you to any special rights here, because we have no idea which of you has one. This is as it should be.