You get a green trust feedback thingy after 3 people on the Default Trustlist rate you positively.
You actually get it after ((number of positive trusts from default trust members)/10)(number of months after first positive trust report.
So if you have 1 positive trust report you get green trust after 10 months, 2 positive trusts then after 6 months, after 10 positive trusts then after one month.
Only one positive trust report from each person each month is counted so if one person gives 5 positive trusts all in the same month then only one would count.