I wouldn't disagree with the former interpretation, but publicly offering thousands of dollars for something carries a real risk somebody will take you up on the offer.

First, I think it can be both, and second, it's important to be careful around the common fallacious defense for shitty people where the implication is that they should not be judged or experience certain ramifications (legal or social) because "it's all just trolling", "for the luls", "you can't take what he/she says seriously", "it's your fault for getting offended", etc. There are certainly arguments to be made one way or the other in these cases, but one standout damning feature that's common to a lot of them (including this one) is that of public reception. If you encourage something, all that matters is how likely and severe the consequences of that are, regardless of whether you were "just trolling". If you're a famous and wealthy person with a cult of personality and a politically divided following (or even if you just hit a couple of those notes), it's your responsibility to not offer people thousands of dollars to get hair from your enemies, even under the (conveniently subjective) guise of sarcasm/joking.

Certainly less than thirty billion

I think there are people whose jobs are to determine the appropriate punishment for criminal actions. They might be able to give you a tighter upper bound