this is a simple job for vbulletin forum addon (hack) to edit/modify something.
The existing addon is to let forum moderator clicks on the valued comments and this valued comments counted in the member data and get paid for them.
We want to make edit to add Like/Dislike icon in all posts to members and let them click on the valued comments themselves.
3 clicks from members on Like icon = 1 positive valued comment to be added and updated automatically in the member details.
The forum is not in English (arabic) but we can help translating how this addon goes.
Good Luck Bidding.