This - plus the skills icons can be chosen freely from font-awesome in skill creation. Maybe we should exclude fa-brand space from the allowed icons. Another good hint, thank you! And yep, the team dearly misses some creative heads for design as everybody involved is from the coding area :)
Because you can use whatever FontAwesome (for which I'm an early backer) icon when you are creating a skill for Alice using our backend skill creator on her browser interface. We could exclude the use of fa-brands.
Someone probably just scrolled through available icons and ended up picking that one.