South Africa's early World Cup exit has sparked concerns that the rest of the tournament could be played out in front of half-empty stadia.
Rain ended South Africa's hopes
The Super Sixes begin on Friday with Australia taking on Sri Lanka at Centurion and India facing Kenya in a day-night game in Cape Town.
And World Cup organisers have urged South Africans not to vote with their feet after their team's disappointing exit in the rain in Durban on Monday.
"Everyone is disappointed that South Africa didn't progress to the Super Sixes," said World Cup executive director Ali Bacher.
"We have shown the rest of the world we have the capability to host a global sporting event of this nature and we need the country to continue supporting in that way they have.
"I can understand South Africa's supporters' predicament, but we need the country to show how important the event is."
Australia and India are best placed to make the semi-finals as they carry forward 12 and eight points respectively into the Super Sixes.
Surprise qualifiers Kenya will resume with 10 points, Sri Lanka 7.5, New Zealand four and Zimbabwe 3.5.
Dr Bacher added he would like to see even more teams involved in the next World Cup, denying claims that expanding the 2003 event from 12 to 14 teams had devalued it.
He said: "If we had 16 teams, you would probably end up with four
sections which, from a time point of view would be shorter, which would be better.
"It's just a thought, it won't be my decision."