8WAYRUN.com was the first gaming site to convert to XenForo. I saw the value of the platform and immediately jumped on it. I am now one of the bigger XenForo third party add-on developers as most of the stuff on my website are programmed in house. since then, I've helped many of the websites in the FGC to update their forums, including testyourmight, vfdc, freestepdodge, and many others.
One such website was SRK. However, working with SRK was a pain and made it a chore to get anything done. In addition, they kept asking me to program in additional features that were harmful to user experiences, including poor integration with WordPress, that they refused to give up, and advertisement systems. I told them it would be problematic and I don't feel comfortable programming such features, but would do it anyways since they were paying me.
When all the work was done, and I asked for my fee, they refused to meet my price. They said they would give me half, and "never talk about money again". Basically, pay me half, and I continue working for free. I took the money, but refused to work for them anymore.
However, SRK is a huge website running my software, so it's still in my interest to make sure it's running well as it's basically a big advert for my add-ons. There was a huge problem, after months of running without a programmer, everything was now out of date, and of course bugs were starting to show their ugly heads.
When people started complaining about bugs, MrWiz tried to blame my software. To which I had to respond that those bugs were fixed almost a year earlier, SRK was just severely out off date. MrWiz immediately banned me and deleted all the support threads I had commented on. A month later they switched to the service hosted vanilla forums.
All this because they are greedy bastards who refused to pay my paltry service fees. The amount I asked for is probably less than two days of revenue from that website.