When I looked further, I also noticed that psek has "reseller" plans. Since I am setting up wp multisite to sell each sub-blog site to my customers with the "supporter" plugin and other money making plugins, will my account with http://wp.mu & psek.com considered as a hosting "reseller" account by psek?
What I do with wp multisite actually is like a hosting reseller when looked from a the hosting company point of view, right? - My customs create websites under my account and I charge them monthly fee to keep their website live - exactly like what a hosting reseller does.
And at psek.com the reseller account charges differently (starting @ $35/ month with only <2G disk space).
What is the catch here? Maybe http://wp.mu has a deal with psek, and this kind of account will not be considered as reseller? If that is the case, how about other hosting companies, such as hostgator, will they see this practice as "reseller" ?
http://wp.mu only supports up to 5 domains. What if my customers all want their own domain names? 5 is not enough in this case.