Subscribe

verb

1. To sign up to have copies of a publication, such as a newspaper or a magazine, delivered for a period of time.

   "Would you like to subscribe or subscribe a friend to our new magazine, Lexicography Illustrated?"

2. To pay for the provision of a service, such as Internet access or a cell phone plan.
3. To believe or agree with a theory or an idea (used with to).

   "I don’t subscribe to that theory."

4. To pay money to be a member of an organization.
5. To contribute or promise to contribute money to a common fund.