Is mySQupgrade a bidding system, and does the offer cover everyone in my booking?

What this answer depends on

• Current mySQupgrade process for eligible Singapore Airlines-issued and operated flights; not all fares or partner flights
• Unlike an upgrade bid, the displayed mySQupgrade amount is fixed. Decide whether the offered cabin and total amount meet your needs; there is no supported tactic of entering a lower bid in this process. An invitation still does not guarantee inventory will remain available.
• Separate flight selection does not mean separate passenger selection within the same booking. The published process applies the per-person amount to everyone in the booking on the selected flight. A request involving only selected travelers needs airline help before proceeding.
• Singapore Airlines describes mySQupgrade as a fixed, non-negotiable price rather than a bid.
• mySQupgrade prices are per passenger and apply to all passengers in the booking for separately selected eligible flights.
• The online mySQupgrade option closes nine hours before departure, after which airport inquiries remain availability-dependent.
• mySQupgrade requires eligible Singapore Airlines-issued and operated flights and excludes specified fares including Economy Lite/Value and Premium Economy Lite.