It always depends on the model and how many we have available. Being a younger company it is hard to give you good statistics because every batch has been different for some reason or another. For example: Last year we had GSO-5.1s but some of the production batch went toward preorders and another portion went to dealers, so what we actually had available sold out almost immediately. As such, people were antsy for them this time around so we listed them for sale as soon as we had materials available. When those materials ran out the knives would be out of stock until more materials arrived. We do have a few more blades being finished up that will be available soon, but after those we are out until the next production run is complete.
If there is a particular model you are interested in I can give you specific information.
The information about regular vs rotation isn't entirely true. We would like for all the knives to be available all the time but because demand outweighs production time, they are all on rotation.