Am I considered an existing customer and will get new Tivo service for just $10/m?

I have had a lifetime Sony DVR 90EA which I bought used about 5 years ago and am thinking about getting a Roamio. I can't afford lifetime but I do see that service is $15 for new customers and only $10 for existing. I have never paid a fee as I bought a lifetime unit so will I be eligible for the $10 service for the Roamio?