Yes I’m considering them but it doesn’t look very promising for most of them. Here is what I found so far:
Constant Contact, iContact and Stream Send all mention in their terms that they dont accept gambling websites.
Mailchimp told me through their customer service that they wouldn’t accept a gambling website. and they also have it in their terms.
I’m not sure now anymore about Aweber ( I thought they told me they wouldnt take gambling but I dont see it in their terms now) so I will ask them again.
Campaigner I have asked the customer support, no reply yet.
Infusion soft also mentions in their terms that they may close an account offering gambling content.