<https://www.spreadsheetweb.com/subscription-based-licensing-spreadsheetweb/#webpage>
<http://schema.org/description>
"subscription based licensing of SpreadsheetWEB server will be replacing the traditional perpetual licensing model as of February 5th, 2018. This is applicable to on-premise or server deployment scenarios – our public and private SpreadsheetWEB cloud licensing model will remain as is."
<https://www.spreadsheetweb.com/subscription-based-licensing-spreadsheetweb/>