Reached out on AngelList, heard back from the founder who passed me to the CMO who set up a time to talk which I confirmed. All pleasant. I spent time researching and auditing their site preparing to speak in depth about it but I didn't receive a call from the interviewer and about 10 minutes after the scheduled call time I gave him a call to see if everything's ok. See answer below. Though I understand these things happen, it wasn't a good experience. Hopefully by the time you interview with them they have a professional HR coordinator otherwise triple confirm your times so they don't miss it.