First of all, this post is not intented to underestimate the value of
rebirthing.

The way the kerbholz echoes are ruled seems a bit silly.
Why a (min 100d old 150m spent to reborn) elder gets to echo their kills via
holz_echo, but 5y old 1.5G worth mortal does not?
I would assume that the older non-rebirthed dude has a lot more memorable
kills to show off than the new commer who has used rebirth _option_.

Could you change the holz_echo command to work at some total exp limit
(rebirth exp + totals or just totals) and/or age limit, please?

I say again. I admire those players who have the time and interest to rebirth,
but holz_echo should have nothing to do with a player being reborn or not.