Somewhat related: here in the UK, littering is technically a crime, but apparently [0] you'll only get a criminal record if you refuse to pay the fine.
[0] https://www.redbridge.gov.uk/roads-and-pavements/fines-and-o...
If you can't pay the fine, it can turn into a warrant that can get you arrested. Thus jaywalking actually is a crime, but only for poor people.
Technically, inability to pay does not have this effect, only refusal. But you have to actually show up to court (as specified in the ticket, which is a summons to appear with bail that can be forfeited in lieu of appearance) and assert hardship to get a different penalty or payment arrangement set if you are unable to pay; if you just ignore the summons and don’t pay the bail set, then you are committing a crime.
So it's still a crime for poor people only.
All of them were arrested for bullshit "contempt of cop" type offenses. If they could arrest people for jaywalking they would have done that because arresting someone for something they've actually done makes for a much harder charge to beat. Jaywalking is just the pretext.