I think plagiarism on this forum is more similar to being utterly lazy in your job than academic plagiarism.
And the truth was spoken!!!
On here, most of the members are from countries where this cultural difference doesn't apply as an excuse. Even if people come from a country where plagiarism isn't a common spoken theme. The fact that they're on here means that they know something, or at least they know how to imitate that they know something, and by definition alone this means that they're at least aware of plagiarism. NO excuse!
Most of those bounty hunters treat this as a source of income AND don't want to put effort into it.
For some bounty hunters this probably applies but for those who practice plagiarism, even their career as a bounty hunter wouldn't take them far. There will be no constructive comments or contributions, no new knowledge generated and in the end this is reflected in their merit.
Plagiarism is a common sense type of thing and i don't think any culture will allow it. Specially for those who are in signature campaigns know that they will be paid for the posts and the no one will pay them if they can't put any effort and copy/paste material from other posts or from the internet.
I think there are two major causes of plagiarism ,
1- The person does not know how to write in English and he choose this path of copy pasting
2- The person thinks that if he copies any text, he will not be caught because it difficult to find the original source.