This is the second time in a short time that I've seen someone comment on a thread on the first page without having read the previous comments. Does this happen a lot?
I think it's normal that if you comment on page 7 of a thread you're interested in, you should read at least the first page and the page you're going to comment on, or pages 1-2 and 6-7, because in general, when a thread gets longer nobody reads all the pages, especially if you're commenting for the first time.
Or click on All next to the thread page numbers and quickly view left posts. Ignore button is a good option to sort spammers and see only genuine posts, it really saves time.
This also happens in other forums, and it is something we have commented on in our local board. Here the payment for signature campaigns may have an influence, but I visit other forums and if I comment on a thread for the first time on page 23, there's no way I've read the previous 23 pages.
One can't read responses of topic that has tens of pages and usually it's really done for the purpose of sig campaigns to post in such a thread. There are only a few exceptions where topic is so interesting that you have to read all the pages like this one:
https://bitcointalk.org/index.php?topic=5457560.0Sometimes people just want to answer to particular post on the last page and that's all. Usually, when someone posts in multiple pages thread without quoting someone, that person is just spamming.
I'm about to send a PM to the manager so he doesn't pay him for that post.
Logically, it's manager's interest to hire a high quality posters whose posts don't get ignored and people see them. When manager chooses low quality posters, campaign won't succeed and automatically this manager won't receive new customers because of low success rate. Just a natural selection, I guess. Problem will be solved without reporting over time.