From iGaming Business – Macau recorded an annual 20% rise in gambling revenues for the month of July to US$3.7bn thanks to a boost in stakes and numbers of mainland Chinese visitors to the gambling hub. The amount was the third strongest figure for 2013 and was achieved thanks to a rise in middle-class gamblers visiting Macau who balanced out high-roller activity. Analysts suggested a slowdown in China’s economic growth had kept away some wealthy customers, who often spend up to US$160,000 on a single bet according to local media, but Macau’s gambling venues had benefited from China’s large and…