I have a fair amount of code available via open source repositories. As in the kind that real people actually use, not just up on my personal GitHub.

If someone is going to ask me to do leetcode problems it means they haven't done their research on me. Why would I want to work for them if they won't spend the time to do this? Digging into my publicly available background should be enough to tell them I am or am not of the caliber they're looking for in terms of hands on keyboard development.

Number 2 is so unusual I would immediately flag the company as a scam. How is asking for money a reasonable approach? There are alternative ways, easier too depending on country, and all you'd be doing is selecting for desperation while also spreading bad rumors from all the people who nope out when they see such malpractice.