There's no 4 post per year rule that I keep hearing about. It's 4 threads per year and 20 frag types per thread. So theoretically, you can sell 80 types of frags per year in as many quantities per type and you can post as often as you like since you can use the "Reply" button in a thread to add more frags for sale (up to 20 max per thread).
If this rule affects people because they have more than 80 types of corals for sale per year, that's a really really impressive hobbyist setup they have there.
