Anything that starts as Open source but is clearly meant to be a for profit product makes me sceptical.

The page has a link "Pricing" that takes to a page that says its coming up.

Well I will wait and see what and how the pricing structure will be revealed.

It is a product that easily lends itself to being a "little vit free and open source" and then all the for profit add ons are $$$$$ and not open sourced .

Wouldn't surprise me if it's just cloud hosting and maintenance for a fee. Might not be an indicator of dark patterns.