On a cost level, yes it would make sense to leverage mstdn.ca but issue is that CBC wouldn't have the complete control & the instant brand recognition via hosting their own instance on their domain name.
It's also much better for the brand to have an account on social.cbc.ca. Something like [email protected] looks better on a branding perspective than [email protected]. It's no different than how organizations use their own domain for emails.
@jimmyjamxoxo
Still remember in my teens playing #Starcraft when the power suddenly cut as I was about to save my game lol.
Still had fun doing other things, including a night walk in the neighbourhood without power & seeing the stars so clearly because there's no light pollution.