Yes, and it is free. When you add people to a list, you pay 1 email credit only for each person whose valid email your workspace does not own yet. People with no email are saved without a charge.
The cost line in Add to list already leaves them out. If we find an email for a saved person later, it is free, because they are already saved.
If you lack email credits for the people who do have an email, the popover says "Not enough email credits" and Confirm stays off. If credits run out partway through a large save, the rest are not added; top up and save them again.
To work only with people who have an email, tick Email found in the Contact Details filter (the chip reads "Work email: valid found") in People search.
| Saving a person with no email | Free |
| Saving a person whose valid email you do not own yet | 1 email credit |
| Saving a person whose email you already own | Free |