Questions about YCH content and multi accounts

Please excuse my poor english. I’m mainly a derpi user, since most sites either are unable to host Webms or have rules against YCH (I had an animation that was 100% complete deleted from one of them because it has “ych” written on it)
 
I did read the rules, but I’m not sure if I understand them.  
“You may not post images intended as “reminder” posts for your announcement or advertisement posts (such as YCH announcement posts)”  
What exactly are we not allowed to post? Can someone please give me some examples? I wish I could share some of mine, but I’m not sure if I can since they are all explicit, and… Well, derpi is down, so I can’t get any links.
 
Regarding multiple accounts, I usually have this one and Brightroom, where I post only SFW stuff. Is that okay, can I create it here? Once again, I did read the rules, but just thought it was better to check in case I got something wrong since I didn’t see anything specific about posting with multiple accs.
 
%And did I hear something about a badge? Me love badges, how can I get it?%

@BlackRoom  

This refers to an artist posting a “ad” for a YCH auction/sale multiple times, with the intent of subsequent uploads to make the ad visible on the front page again.
 

Using multiple accounts for different purposes (like SFW/NSFW split or having a roleplaying identity) is fine. What is not is using multiple accounts (or being anonymous) to pretend to be different people, for example to argue opposite points on the same image/forum thread, or to appear to give support to yourself.
 

To my understanding (and I may be slightly out of the loop on this one) there will be a badge granted to everyone that registered and used the site before some future date this month.
 
 
And welcome to the site!

@Teaspoon  
So posting YCH ads are allowed but only once right? or we’re not allowed to post any ads at all?

@ChonkyCrunchy  
Once is fine.

@Teaspoon  
Ah alright thankss