Handling multiple values for an object in a form

Exploring how we could allow users to provide multiple values for a single form object in a simple but scalable way. This shot shows 3 potential solutions:

01 - Show a single field with a CTA to add another value with each value having it's own text input. More usable, less scalable.
02 - Show a single textarea where each value entered is shown as a token/tag. More scalable.
03 - Show a single textarea where each value entered (and separated by a comma) is shown as a simple token/tag. Also could include the ability to import bulk data from a spreadsheet. Most scalable, less usable.

There are likely additional ways of solving the problem – any ideas? I'd love to hear 'em! As always, feedback welcome.

Made with the stellar crew at Underbelly.