First of all, by posting referral links in posts, you are trying to advertise it but it isn't allowed
A.1)
Hey. Referral links are actually allowed in certain threads, for instance if a person asks where they can get free bitcoins or what site should they invest in etc then it's ok to post them, =snip=
A.2) You are allowed to advertise in signatures but not in posts. Edit: You can advertise in posts if certain conditions are met(explained below).
=snip=
Ads are typically not allowed in posts (outside of the signature area) because they are annoying and off-topic. It is especially disallowed to put ads or signatures at the bottom of all of your posts. Except for traditional valedictions, which are tolerated but discouraged, signatures are for the signature area only.
However, if you are using the forum as a publishing platform to host something really substantial and useful, selling ads in that substantial work is allowed. To be eligible for this, your post must be in a topic that you started, and your post must be substantial and long enough to make the ad seem entirely insignificant. If in doubt, ask me.
A.3) It is a service and announcing it is allowed. If anybody is spamming posts with links to rotator, you can report it.
A.4) If it has any discounts or any giveaways, it probably fit in Games and Rounds. It is also allowed if a user is posting ANN or similar about a site, he is allowed to use referral links or invite codes but he shouldn't just post "hey, use this invite code and get X% discount!"
A.5) I don't think you can add when you are posting a review but you can add when you post an ANN thread about the site if there isn't one.
A.6) No, IIRC BadBear has said that if a user has referral links in signature and posting in the thread saying "check my signature" is also considered spam. So what you asked is obviously a spam.
I am pretty sure moderators know all these. "They are smart folks!" ~ BadBear.
P.S. Not an answer which you can rely 100%.
Edit: Discussion regarding referral link :
https://bitcointalk.org/index.php?topic=987319.0