The website states that membership is automatically renewed after one month or one month after the trial period. Presumably, this means that you can send out freebies yourself to those who have already used the trial, but unfortunately it is unclear whether Apple sent the offer to all subscribers worldwide or only in specific regions. Either way, it seems that tech giant hopes to get more paying members by getting them connected to the service.
As noted by 9to5Mac Apple's whistleblower blasts were not good with some subscribers, as they saw a violation of their own App Store guidelines. Section 4.5.4 of the Platform's rules clearly states that apps are not permitted to use push notifications "for advertising, promotions or direct marketing". It's not the first time Cupertino used the method to market its own services, and it probably won't be the last.
̵1; Ben (@bbchase) February 15, 2019