There are updates on the latest features of Propel, including usage metering for ChatGPT-powered LLM apps and SOC 2 Type II compliance. The company is seeking feedback from developers building GPT-powered products and invites them to chat or book time with their team. Propel also shares blog posts and podcast episodes on topics such as tracking key metrics with the ChatGPT API, reducing Snowflake costs, and improving data quality. Additionally, the newsletter highlights successful projects and provides a free account sign-up for developers to start building with Propel.