Most landing pages just ask for your email address -- which is likely because the fewer fields, the better the conversion.
The problem is addressing your subscribers in the emails you'll send them.
How do you open your email copy when you don't have the person's name? Without calling our their name in the body or subject line, wouldn't the email seem generic?
Invest in good copywriting. 'Generic' is much more likely to come from a lack of tone and personality than a lack of personalization. Which of these feels more generic to you?:
Subject: Alan, Get 20% Off BrightJourney Premium Today
We're proud to announce we've found some ways to further reduce our operating expenses, and pass those savings on to you. We're going to be looking at ways we can add even more value to make premium memberships worth the current pricing, but for now we're offering 20% off your purchase of a year-long BrightJourney premium membership. As you are one of the most active members currently on our free plan, Alan, we hope you'll take advantage. Visit http://brightjourney.com/this-isnt-real to learn more.
Subject: You're a top BrightJourney-er, we're giving you 20% off
Good news! We're offering 20% off premium plans to our most active free members.
This. Means. You! Our analytics show you love BrightJourney, so check out the freshly-discounted premium plans: http://brightjourney.com/this-isnt-real
Some other things to note are: