One thing you certainly did do is remove the linkback from the footer of the WordPress template you're using, and claim copyright over it. That's not the first time you did it either. Point of my post being is that no one can claim that they never infringed on someone else's copyright on the Internet. We do it all the time, maybe not intentionally or for-profit. But it's still copyright infringement nonetheless, especially if we try to pass off the work as ours, or use the image(s) in the website's design without crediting the author.
IMHO, only serious thing they did here is run a copyright infringing forum, but even that didn't have that much of an impact to the authors since it was local, and I doubt a lot of people from Vietnam even pay for scripts, let alone themes and modifications.
They're trying to correct their actions, and I applaud them for doing so. They could've just ignored the community, but they obviously do care. Many companies do just fine without their presence on official software forums, even though it doesn't help the business. But so long as you have the product people are looking for, you won't have any problem selling it.
