I checked every help area of the UG website and couldn't find out how they actually rate your tab. ie who does it and when?
If it wasn't for bad luck, I wouldn't have no luck at all
Any users can rate your tabs and forever, as long as your tab is on the site. example: i could rate 1 of your tabs right now. and i could rate another in like 3 years, but people without usernames can not. good enough for ya?