Kamui Kobayashi has already raised more than EUR 600,000 as he bids to pay for a formula one seat in 2013.
Having lost his Sauber seat, the Japanese set up a website asking for donations from his fans.
He wrote on Twitter on Tuesday that, in the first few days of the kamui-support.com website being live, he has already raised much more than half a million euros.
"Thanks so kindly for the support," Kobayashi wrote in Japanese.