Someone I know chose an alternative place to host their website because that host explicitly said "unlimited bandwidth" (though of course, there will always be hidden limits with these types of services in the "fair use" section of the terms).

Wikidot does not mention anything about bandwidth on the plans page: http://www.wikidot.com/plans - and therefore it was implied that there was some kind of hidden limit.

I'm fairly sure that Wikidot allows an unlimited* amount of bandwidth, so if this is in fact true, it would make sense to advertise that on the plans page!

If not, it'd also make sense to mention what the limits are on the plans page, so that people know exactly what they are paying for.