Toby,
I read somewhere that there was a limitation on the number of members
that can be added via Direct Add at one time.
If so, what is that number?
It isn't a limit, per se, but if you add more than some number in a 24-hour period your Direct Add will be moderated. That number was initially 20, but may or may not have been increased since then.
And suggest that it be mentioned on the Direct Add page.
That's a good suggestion, but it is possible (like most anti-spammer limits) Mark won't want to say exactly what the limit is.
Shal
Shal Farley