In this week's newsletter: Y Combinator has a new president, DoorDash raises $600M and startups go on acquisition sprees. : Hello and welcome back to Startups Weekly, a newsletter published every Saturday that dives into the week’s most noteworthy venture deals, fundraises, M&A transactions and trends. Let’s take a quick moment to catch up. Last week, I wrote about an alternative to venture capital called revenue-based financing and before that, I jotted down some notes on one of VCs’ favorite spaces: cannabis tech. Remember, you can send me tips, suggestions and feedback to kate.clark@techcrunch.com or on Twitter @KateClarkTweets.