Substack announced on Thursday it’s introducing a few new features for podcasters on its platform. Most notably, the company is rolling out a Spotify integration that will allow podcasters on Substack to sync and distribute all of their free and paid episodes to Spotify’s streaming service. In addition, Substack is introducing new custom audio transcripts and captions, along with improvements to clip sharing and mobile video. The launch of the new features comes as Substack has announced that po...