A customer who receives a poor quality product or service on

A customer who receives a poor quality product or service on their first visit and as a rescult
never returns,is losing the company thousands of dollars in ___ profits.
请高手分析下子这个句子的成分并且翻译一下
Established customers tend to buy more，are predictable and usually cost less to service than new customers.
这个句子和上一句一样都有一个逗号（，）隔开 所以我不太能分析出这个句子的主谓宾