Someone at work expressed an interest in the game so I sent them a referral link, but they never received it, I tried three times before I just pulled up the site on their phone and gave them my username.

Is it possible the Email was going to spam?

If you want to send me a PM and include their Email Address, I can check the logs and see if it was sent.

Additionally, were you able to successfully link to their account? If not, can you link me their Sylestia account and then I can retroactively attach the accounts.

We double checked that it wasn't in her spam, I just sent her an email to be completely sure she's okay with me giving someone her email. I think things got a little crazy with her internship and she might not have got around to making her account yet, but I'm checking in on that. Will pm you when I hear back from her.
(Sorry for the late reply, I've been a little busy myself).

No worries.

Alternatively, they can just register an account and manually put in your Referral ID when creating their account. All that the email does is just automatically do this if they click the link from the email.