To clarify I believe it's for reporting link spam, not comment spam
Same here, got like 10 gems yesterday just for reporting spam links and comments!! Finally there will be less spam :)
Yeah, I also got a few SG for reporting spam.
I don't think there is a limit. You will receive 1 SG for reporting spam when the moderators approve your report.
I.E. If you report someone's comment as spam, it will go to a mod-queue to be evaluated.
Only if a moderator finds that it is truly spam and deletes it, then you will be credited with 1 SG.
You won't be credited if your report is false. This is to prevent users from abusing the report button.
Ah that's good then. So less comment spam and link spam
Hey there lola so you're a Moderator your self
Yeah i got a point for reporting spam as well thing are about to change here
Same here 
@Kabash: Do repeat offerender get punished in way for constantly spamming?
@Swaggerino: No one is stopping you getting xp, we don't want the forum filled with spam though. If all the spammers stuck to 1 spam thread it wouldn't bother me at all, it's the countless spam threads being created and people spamming normal post with "here for xp" etc... that's annoying.
What happens when we mark a normal comment as spam by accident? I did this already 3-4 times
@fluff2:
To answer your question, yes.
We can issue both temporary bans (Soft-Bans/Bans with a time duration) and Permanent Bans to deal with repeat offenders.
We also have the ability to escalate it to GameHag's Admins to issue a Permanent IP-Ban, should they attempt to bypass the ban.
However, we will exercise restraint and will not ban users unless absolutely necessary.
Repeat offenders will first be issued a warning, either as a comment by a moderator in one of their forum posts or through a direct message. This is done so as to give them a chance to correct their behaviour. If they fail to do so, only then will a ban be issued.
Hope this clarifies your question!
@skullaccio
What happens when we mark a normal comment as spam by accident? I did this already 3-4 times.
nice spams
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I just realized I got 1SG for reporting spam. Did you get any notifications or SG for reporting spam this morning?