Nah, what you do is you add this feature for everyone, unless it doesn't make sense
YES!
Adding features just for single customers doesn't scale, adding features useful to many customers does.
None of this means "hiding" information, but you can't put something like "We'll do X hrs of extra work if you buy Y licenses". Just like the any store might have a 10% discount if you buy a dozen, but if you want 50,000 then there will probably be a conversation involved.