Great Idea, great offer, I'll send my pitch email. do you have any limitations ?(something like the first 20, only x peoples, since you have 2 to 3 adspaces to

Great Idea, great offer, I'll send my pitch email. do you have any limitations ?(something like the first 20, only x peoples, since you have 2 to 3 adspaces to offer or it just needs to be interesting for your audience?).