The rise follows the company's latest weekly draw virtually held on Tuesday in Lilongwe about four weeks since the start of the promotion last month on May 13.
Among the latest four to win the weekly ultimate prize is 28 year old Cosmas Zapala of Dowa district.
"Have I really won or you just want to steal from me?" asked Zapala in a separate interview immediately after the draw.
During the virtual draw, the mobile technology company further identified 250 winners who have won K10, 000 prize each.
Airtel Malawi Publicist Norah Chavula has since expressed satisfaction with the impact of the initiative, saying it is helping encourage efforts on financial inclusion. The promotion is a customer thank you gesture following Airtel Malawi's reach of 5 million subscribers in December last year.
It will end on 15th August this year. Grand prize for the promotion is K5 million. Entry involves loading mobile phone units of at least K200.