They can earn decent money but will they be able to join another campaign once 1xbit campaign ends. Mentioning the 1xbit being the highest won't do good at all because there might be a group of people who will join because of it.
The 1xbit campaign manager has been less lenient in recent times and is only focusing on selecting participants without any negative feedback. Also, it seems like they are carefully paying participants based on their post quality.
Basically, a scam site like 1xbit isn't throwing away their money due to which their shills are working harder to defend them though it's all pointless in my opinion.