You can do it with UltimateWB. Use the built-in e-commerce app if you want to sell a subscription, along with the members app if it’s a member subscription. UltimateWB also has a built-in mailing list app you can use for users to opt-in to a mailing list. Then you can send out mailers to your mailing list subscribers.
Got a techy/website question? Whether it’s about UltimateWB or another website builder, web hosting, or other aspects of websites, just send in your question in the “Ask David!” form. We will email you when the answer is posted on the UltimateWB “Ask David!” section.