When you "share" a proposal with someone via the email link, the body of the email says something like:
I'm hoping that a site for professors, theologians, and those interested in exegetical analysis of biblical texts. would have the same kind of network effect and turn into an amazing resource.
The extra period after "texts" is there because the proposal description ends in a period (and it looks like all proposals are that way). That extra period shouldn't be in the invitation email (it occurs on a previous line too).