 Electronics drove much of the consumer spending on Amazon during day one of the company's Prime Day sale. Video games and small kitchen appliances were also popular. Adobe Analytics finds 7.5% of consumers opted to pay for their purchase using a buy now, pay later system. That's up more than 17% over last year. Tuesday was also the biggest day for online shopping on a mobile device this year, accounting for $3.5 billion in spending. Mike Dabusky, ABC News.