Your price plans are all listed as bulk key generation. Can you explain so things about this ..
Bulk key generation is just a feature. Lets say you're shipping boxed software, so you'll need to make several thousand product keys to print on these DVD cases. Instead of paying some intern to press the "make key" button thousands of times you can simply specify how many product keys you want.
But you don't have to use the bulk keygen. You can make product keys one-by-one.
are the SN's unique to visitors?
I'm not quite sure what you mean. Can you elaborate?
are a user's account tied into their email account entry and is the email verified on each period update, such as when using a software rental model?
The email field is completely optional. It's mainly used by software companies that want to add a "Find product key" functionality to their website. If they specify an email when they create the product key (or add it later) they can then use the limelm.pkey.find web api function to get the associated product keys with that email.
It's for your convenience only. You can use the email however you want. You can also store addtional data alongside the license using the custom license features.
do you provide a wrapper for exe's and dll's if we want?
You mean like obfuscators?
I imagine we could also protect/prompt during any install or re-install?
Yes. We can help you integrate it with your installer if you want. Just tell us the installer software you're using.