通信料金値下げで市場縮小の危機 – S-MAX http://okane.robots.jp/2021/12/12/%e9%80%9a%e4%bf%a1%e6%96%99%e9%87%91%e5%80%a4%e4%b8%8b%e3%81%92%e3%81%a7%e5%b8%82%e5%a0%b4%e7%b8%ae%e5%b0%8f%e3%81%ae%e5%8d%b1%e6%a9%9f-s-max/