Surprise Issues!

Publishers are entertaining entities. While a lot of them are folding up their tents or going online only...there are several publishers who continue to send surprise issues! Often these issues are called "special" or "supplement" or "bibliography" and such...and then there is the one I just received today. It is not only a "special" issue -- it is also a change of publishing frequency! I haven't looked yet to see if this "extra" issue also adds onto the price for next year or if it a mere "bonus" by the publisher. *Sigh*