Quick noob question. Never used such sites before.
Sometimes in forums I run into urls like:
coinad.com/?r=XXXXXXXXXX
Those are referral links I guess. How do I use them? If I click on those links the main page of coinAd pops up with no options or anything.
Referral links basically give a bonus or something similar to the user who referred you, to encourage people to spread word about the service. They usually don't change anything the end user sees on the site.