Gringuito special meals should have no effect on an e-mail upgrade offer. Even so it would be wise to use MMB to check that the request has transferred.

With regard to loads please be aware that seat occupancy maps only show blocked and actively selected seats. If a passenger selects a specific seat then it will be visible. But if a passenger does not select a seat then the reservation will not be shown on the seat map Thus seat maps nearly always show fewer than the actual number of reservations thus giving the impression of low loads. It is thought that the numbers shown on many websites only show the number of selected seats not the number of passengers!