Ah, I understand the situation now--when I read the OP this morning I was barely awake and didn't look into the particulars, but I just did (at least as far as Mpamaegbu is concerned). 

Forgetting to cite a source is something anyone could do, and in Mpamaegbu's case I think it might be the truth.  I just posted my opinion about it in the Report Plagiarism thread where it was uncovered.  If that turns out to be the only instance of Mpamaegbu not citing a source, then I'd probably give him the benefit of the doubt if I were the manager of the BestChange campaign.  As I said in my post, I'm fairly certain Mpamaegbu knows the consequences of plagiarizing and that a good number of members are hard at work sniffing out examples of it. 

In my previous post I said that "mistakes" usually don't happen, and that they're just an excuse members make up when they're busted.  I'm still sticking to that, but this might be one of those times where forgetting to put in the citation actually did happen.  Mpamaegbu's post history is probably being combed through for other instances of plagiarism as we speak, so we'll see what turns up (if anything).

I'm much less familiar with Pokapoka124 as a member, so I have no opinion on his/her posting habits, nor has that member said anything about the accusation that I'm aware of.  I'd say if any other examples of plagiarism show up from either account, then we know what we're dealing with--not mistakes but intentional plagiarism, and the usual consequences will ensue.