Each member of a group usually has their own individual site on which they release their personal works, free to download, and possibly give updates about their involvement in upcoming albums. Some artists actually never release albums and contain the scope of their artistic activity to free releases. The most productive groups usually release two albums a year, released in the summer and winter Comiket conventions and sold for an average of 1000 yen for full-length albums. The most involved and popular artists are usually featured on their own group albums but also make guest appearance on other groups' CDs.