I collect worldwide and use Scott International Albums of which I have about 50 books. In the past I would get the annual supplements at around $120 each. For the past few years I stopped buying them because I became so frustrated by the fact that for many countries they leave out up to a half or more of the stamps because they happen to be printed on mini sheets. Many countries, such as France, Belgium, Netherlands, have taken to issue mini sheets, each of which contain up to 20 different stamps and make up most of the postal issues of the year. These stamps are not just philatelic items but are used in high numbers as postage. For Japan 80- 90% of their yearly postage is from these mini sheets. The fact that Scott has made the decision to do this to worldwide collectors is bad for the hobby as well as costing Scott customers.
I have noticed that too when I purchase stamps on Scott pages. I assume it is to keep page count down. I use Steiner pages and it includes almost all the minor variety sheets so a lot of pages with just the mini-sheet. I guess they think people will buy blank pages. The cost is high to collect modern worldwide on Scott pages.
Al Mission: To collect and preserve Member APS, PNC3, ISWSC
Steiner pages include spaces for almost every stamp listed in Scott, and I use them a lot to supplement the Scott pages which do not include most varieties, souvenir sheets, or mini sheets in their worldwide yearly supplements. The problem is that Steiner does not have pictures or descriptions or Scott numbers of the individual stamps in a mini sheet. This makes it difficult if not impossible to determine which mini sheet and/or where on the sheet the stamp belongs. This is especially true for Japan whose stamps have no date, the cancellations have no recognizable date, and there are many repeated mini sheet series several times a year over many years.