I really think

I really think the reminder should come in the same form as the original verification, e.g. via email. Isn't that partly the point, that they are verifying they own the email address? what do we get from them doing more actions on site vs actually verifying the email address?

updated the title to be channel agnostic until we decide which method is best.

The WMF core features team tracks this bug on Mingle card https://mingle.corp.wikimedia.org/projects/flow/cards/388, but people from the community are welcome to contribute here and in Gerrit.

(In reply to comment #2)

I really think the reminder should come in the same form as the original
verification, e.g. via email. Isn't that partly the point, that they are
verifying they own the email address? what do we get from them doing more
actions on site vs actually verifying the email address?

Yes, the point is to verify they own the email address. However, we want to minimize the amount of email we send to unvalidated email addresses. That is why you often see sites with a "Resend the verification" option. We also have that; you can visit Special:ConfirmEmail directly, and it's also linked from your preferences (which explicitly tells you whether your email is confirmed).

If we simply email every non-confirmed email twice, we're doubling the impact on people whose emails are abused when signing up (unless they choose InvalidateEmail, but a lot of people probably won't get what this does).