定语从句里一致性问题

Apple has fallen behind companies like 谷歌,Amazon and Microsoft, which nowpull in significant revenue fromselling cloud services, which is a fancy term for data center usage and storage.请问最后一个which先行词是复数的cloud services（当作整体看），还是单数的service？

最后一个定语从句，是一个“词汇讲解”或“术语概念”性质的句子。

英语中的service 用来表示“商业服务”定义时，一般用复数。“云服务” 是商业活动，自然要用复数。以下是《柯林斯词典》的注释：

N-PLURAL（复数） 服务业；服务性活动 Services are activities such as tourism, banking, and selling things which are part of a countrys economy, but are not concerned with producing or manufacturing goods.

作为一个新潮的整体看待的术语，cloud services 虽然是复数形式，但指“单数定义”，而且表语是 a term，所以，网友的句子，关系代词which 后用is 是正确的。