First, very cool. I agree it's best not to use images for simple blogging.

Some concerns: How can I trust this service's promises(ex: privacy) if the source code is not publicly available? Also, how can I be sure if this platform is not one of your personal projects that will be shutting down in a month without any notice because “there aren’t enough users."

I also think it would be wise to collect small fees(even if it's like $1 a year) because there will be lots of spammy blogs. Nobody likes using a bot-dominated platform.

Writing here feels great though.