为什么加拿大枫叶卡持有者还可以入党？

枫叶卡没有选举权，但却可以入党，好奇怪啊。

比如加拿大保守党的入党条件是：

I am a Canadian Citizen or Permanent Resident of Canada.

I actively support the founding principles of the Conservative Party of Canada.

I am at least 14 years of age.

I do not hold membership in another federal political party.

My membership fees are paid from my own funds and no individual or organization will reimburse me.

大家怎么看这个问题？我觉得很奇怪啊。

政党存在的目的就是为了选举，外国公民又没有投票权，干嘛要允许他们入党？

https://donate.conservative.ca/membership/