Email referrals are they any good?

I’ve recently changed the email letter heads my website creates to link to my site www.onlineletterhead.com just the bottom bit.

And I’m getting a few email referrals which I haven’t had before and I’m wondering:

Are email referrals a good selling point for my custom letterhead service.
What I do with those is link the graphics to the owners website if they want.
Which I figure is a good way to help folks promote their websites.

Are they a good selling point or are they pretty worthless?


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