Back to topic: those stars are not well explained imo.
It is quite confusing on several grounds. For example, why do only some threads have such a rating? We know that forum moderators do it, but we don't know when and why it is given.
What further confuses me is that signature threads often have similar content. Application for participating in the campaign and confirming payment. It is very unclear why some campaigns have 3 stars while another has 5 stars (for example, currently a campaign that has just started)
Now the admin and mods should think, because an uninformed person, if he looks through the stars, can conclude that it is the reputation of the service that favours one over the other. At the same time, without a real and clear basis.