Hi DW,
This is NOT a purchased list! Please read more below, I've just a lost a little confidence in what you understand about promotional mailing to subscribers - it appears that you're in the business of creating software for list mailing - you should come to learn a little more about how it's used for promotion when promoting products!
My list is from past subscribers, they have ALL personally visited my website where I collected their email, they were opted-in automatically WITH a confirmation email sent to them first, and opportunity to opt-out in every email, follow-up promotions are used to send out SAMPLES of my product so that the purchaser can make a decision on purchasing the product. It's a low dollar product (so high numbers of subscribers required to be emailed to get a purchase).
I nearly went broke for the first 3-4 years in my business (taking out a second mortgage on my house to live) while I built up my subscriber base - this DID NOT HAPPEN OVERNIGHT. I respect my list and email to them on a conscientious and normal schedule, I have NOT had considerable complaints as you mention, in fact very few have ever complained, they simply remove themselves from the list if not interested.
Please try to put the same hat on yourself, imagine nearly going broke trying to build your list for 3 years and then have a web hosting service claim you are 'SPAMMING' people because you send out emails to your large list - HOW WOULD YOU FEEL?
Personally, I don't recommend ever mailing purchased lists, no matter how exclusive they are (or claim to be). You will always receive more complaints than you would if they actually subscribed at your site.
Furthermore, if you do email purchased lists I highly recommend a dedicated server, as your list(s) will likely exceed 50,000 users and a shared host will definitely not like receiving the inevitable complaints.
Where did this COME FROM?
Please read my post in it's ENTIRETY... I don't have a purchased list, I've been in business for 8 years (April 2005 it will b 8 years), these are ALL my contacted visitors to my website, it's NOT a purchased list...
Please don't fall into the SAME BELIEF of web hosts who think they know a difference between UCE/SPAM and subscribers collected from YEARS in business!
That's ALL of my two cents, I'm hoping for some understanding and respect in your reply.