"It is a pity as in the past you have been very helpful and co-operative with getting products and especially Artisteer to work in your environment."
Joe gives mojoPortal away for free and he gives away the Artisteer plugin. He was helpful by giving both of these products of his time and energy to you. The home version of Artisteer is no longer supported because the amount of time it took to make changes to mojoPortal to continually support Artisteer with every version they release was taking too much time away from developing other features of mojoPortal. The plugin helps with mojoPortal's support of Artisteer easier and exporting a mojoPortal skin from Artisteer easier than it ever was before. Unfortunately, Artisteer doesn't allow their home version to take advantage of their plugin system, that's not mojoPortal's fault.
Your suggestion that Joe is no longer helpful or cooperative probably made him feel as if all of the support he has given you is not appreciated. Had you not went that direction, there are probably a few people who would have happily taken your Artisteer project file and created an export for you.
Joe does recommend Arvixe hosting but I don't think he goes around preaching about how great their hosting is. He also recommends to those who require a bit more support for their hosting to use my company, i7MEDIA.
Joe provides nearly all of the free support on these forums so you have no basis to say he doesn't support mojoPortal.