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同学好，
entitle是动词，意思是：给予权利；使符合资格，这句话里的意思是给予消费者享受优惠价的权利, entitle sb to sth。

to give someone the right to do or have something
给予权利；使符合资格
Being unemployed entitles you to free medical treatment.
失业时，你有权享受免费医疗。
[ + to infinitive ] The employer is entitled to ask for references.
雇主有权索要推荐信。

https://dictionary.cambridge.org/dictionary/english-chinese-simplified/entitle

Have a good day!