As someone who has just purchased a Hosted Community I am pleased with the support that I have recieved.
I think that the package is a very good deal for people who cannot afford to purchase a licence outright. I am a student so being able to have hosting and a forum all for $9.99 a month is a fantastic deal in my eyes.
Yes, the 10 user limit may be small, but realistically most new forums won't start to get 10 users online at the same time for quite a while, and when they do they should earn some income from ads/donations to increase the hosting package. As for the maximum number of posts this can be combated by pruning and deleting posts if neccessary.
All in all I think that the community hosting packages are a great deal, and my forum loads much faster than others that I have seen. Not to mention I get hosting support from IPB who are experts at optimization of speeds and stuff for their own software!