Paris 2024 sold a record 12 million tickets for the Olympics and Paralympics, beating the Games record previously set by London 2012, organisers said on Sunday.
Palfrey's comments triggered a fierce reaction from team officials and the Australian Olympic Committee.
Lin clinched gold in the women's boxing final match on Sunday, an emotional win that came as she and Algerian boxer Imane Khelif have been embroiled in a major row over their gender eligibility.
Tennis was introduced to China in the 1860s, but it failed to gain mass appeal and was largely an elite sport reserved for the wealthiest families.
The Australian Olympic Committee has decried a "misleading and bullying" online petition that described Gunn's performance as "unethical" and questioned how she was chosen for Paris.
Indian wrestler Vinesh Phogat on Thursday lost her appeal to the Court of Arbitration for Sport (CAS) after her disqualification from the women's 50kg final at the Paris Olympics for being overweight.
The athletes, fresh from a national record 53 Olympic medal trawl, were asked about absent colleague b-girl Rachael "Raygun" Gunn.
Australia's Olympic team, including gold medallists Jessica Fox, Kaylee McKeown and Ariarne Titmus, arrived back in Sydney on Wednesday to a rapturous welcome from friends, family and Prime Minister Anthony Albanese.
Jamaica were in third spot after the opening leg, but Andrenette Knight dropped the baton after bumping Ireland's Rhasidat Adeleke on the second leg.
The USA's dream team of NBA superstars held off France 98-87 to take their tally of men's Olympic basketball golds to 17.
Kenya's Faith Kipyegon made history on Saturday after becoming the first woman to win three consecutive Olympic 1,500m gold medals with a superb display of middle distance running.
Mallory Swanson scored the winning goal as the United States edged Brazil 1-0 in Saturday's Olympic women's football final to claim the gold medal for a record-extending fifth time.
China claimed their fifth gold from five competitions at the Games.
China completed a historic clean sweep of all eight Olympic diving gold medals after Cao Yuan won the men's 10m platform final in Paris on Saturday.
World Athletics chief Sebastian Coe believes the dominance of American athletes in Paris can bring the sport out of the shadows in the United States as the country builds towards the Los Angeles 2028 Olympics.
Two-time Olympic marathon champion Eliud Kipchoge was hoping for a dream finale to his career at the age of 39 but ended up handing over his running shoes to a fan.
Ethiopia's Tamirat Tola won gold in the men's marathon at the Paris Games on Saturday while Kenyan Eliud Kipchoge, who had been bidding for an unprecedented third consecutive Olympic crown, failed to finish.
"It's Algeria's victory," her father, Omar Khelif, told reporters as he watched the fight on a giant screen along with the rest of the village around 300 kilometres (185 miles) southwest of Algiers.
