I have done 250 plus in three hours twice before. The first time about 33% were flagged, the second time all of them were ghosted. The good thing is I now know why, after hours of reseach.

I'm still learning with CL but from what I have learned so far I can't see why posting would be limited to 20 per hour, the ghosting and flagging depends on multiple variables such as IP address, uniqueness of post, 'spamminess' of post, catchall or account, urls in post, time lapse between posts, city, ad section etc.

I would say that if you have all of the above conquered, and you have the facility to rotate them all between posts, then there is little or no restriction.

And from experience, I would advise that your software needs to be flexible enough to provide the facilty to rotate all of the variables.