Is there a limit to how many Travellers I can request the reward for at any one time?

No, you can request rewards for multiple Travellers at any given time.

General

Select language and location

China – the Chinese Mainland, Hong Kong SAR, Macao SAR and Taiwan Region
Hong Kong SAR - English
Chinese Mainland (China) - English
Taiwan, China - English
香港特別行政區 - 繁體中文
中国內地 - 简体中文
中國台灣 - 繁體中文

Africa
South Africa - English