They're telling you average salary grouped by how much has been raised by the founded company when the interview occurred.

So for companies that raised at least 100k but but not more than the next band of 5m, the average salary was 75k.

except that "average" is like 1 or maybe 2 MAX data points, so I wouldn't read too much into this.

At the low end that's almost the entire amount raised for just the founder's salary.

That question is largely why I'm not on Twitter much at all.

I wish someone could give a little more context, or ... I wouldn't be yelled at for honestly not knowing and asking. I get folks being Socratic is a common troll tacit but it's so bad that you can't not know and ask sometimes without being mistaken for a troll.