My first hologram sim card is on the way. I AM SO EXCITED thanks!
The hyperlink in the registration email (for me at least) is plain text so not clickable, and the expiration window for that link must be something like 12 hours.
I signed up (but did not activate) one afternoon and then tried to activate the next morning but the link was already expired.
So, this is probably all already on your radar, I realize:
1) HTML emails / clickable links for registration process
2) Longer "window" for account email verification links
3) Maybe some kind of email verification "nag" on the account panel