I just signed up for versioning newsletter, all I did was pit in my email and I got a quick confirmation.
I also signed up for oppsdaily, but the verification with MailChimp was quite difficult. I had to select pictures with grass, then select images with house numbers, then select new images with house numbers. You might want to consider using a different provider.
This is Googles captcha system and its used by a bunch of services. It has nothing to do with Mailchimp (except that they use reCAPTCHA) so changing mailing list provider for this might not be a wise idea.
With that said, I much rather prefer this new reCAPTCHA compared to their old version with hardly any readable characters.
I also signed up for oppsdaily, but the verification with MailChimp was quite difficult. I had to select pictures with grass, then select images with house numbers, then select new images with house numbers. You might want to consider using a different provider.