well hm.   yeah the user flow is a bit weird.. as a test user i fill out the form, get an email, (and pretend that i didnt get the email), as this would be normal, then im asked to fill out my profile.  
at this point most people have already had a dozen notifications go off, and have probablly forgotten what they were even doing..
then they get an email finally and the token has either expired or they click it successfully, and then see the "fill out profile" and another dozen facebook notifications go off, and they're lost again....
most likely never to come back.
there must be a creative solution to this without being overly intrusive or just copying the strategy of make noises to gather attention. i wish people were better at focusing, but they've been trained not to be, so i understand the why, i just yet cannot see the solution,
(which always comes from variables not present in the problem itself...)
that aside, it makes it even more perplexing once they do fill out their profile, because the next time they come back to the site to log in, the login form appears to do nothing - no errors, nothing. the entire page just SITS there. it does not automatically refresh, (and i know there must be an easy way to fix this....) there has to be.. kinda like perhaps how you can tell a page to refresh after it gets data, much like using a favicon v=? in a url as way to refresh dynamic and mostly static/mixed content without having to call an entirely new page.. but i have never set that up on any website i've built, and am more open to an easy solution if there is one already existing....