Just for reference, while it has been edited, the comic is by Stan Kelly, The Onion's resident cartoonist. Kelly is fictional, a satirical stereotype of a right-wing newspaper cartoonist. His signatures are over-labelling everything, gratuitous self-inserts, and framing the wealthy/other advantaged groups as morally upstanding patriots unfairly victimized by their inferiors. The latter is usually accompanied by them crying a single tear.
All that to say, in the context of a Kelly comic, "Honest Tesla Salesman" is definitely meant ironically.
BlueSky is open source. The web site, the mobile apps, it's all on GitHub.
The one part of their infrastructure that's not open is the discover feed. BlueSky claims they have to keep that secret in order to prevent it being manipulated if it was known what it promotes. Kinda sketchy, but the feed is optional and can be replaced with fully open alternatives.
The more important factor holding it back from being as open as, say, Mastodon, is that it is prohibitously expensive to host due to its content indexing system. If you had the financial backing to support setting up another instance, you could.
Ultimately though, that's what causes the same Caesar issue for BlueSky, at least right now. You can't take your business elsewhere within the "BlueSky fediverse" because nobody else is offering to host. Getting on board with their federated system requires that you optimistically hope that somebody else will step up if this Caesar goes bad, which is a huge gamble.