I think the office hours are a super awesome idea and I'm really surprised the response hasn't been greater. It is a super useful practice and one of the really cool things, that modern technologies offer us - direct contact to the creators/authors of things we use and consume. Another cool example is Mike Perham's Sidekiq's Happy hour: https://sidekiq.org/support.html
I started using Alfred again recently ago and I really love it. I do want to build a workflow. I think there is a ton of great resources on how to do that, so I haven't hit a blocker yet. That's why I don't currently need to visit the office hours, but if there is the possibility to do this in the future, I'll definitely want to join one of the sessions.
Also, next week I'm visiting Lisbon and would love to grab a coffee with you and meet you personally, if you have the time.