Almost 
The 2nd expression just has the brackets in the wrong place. This works:
OR:
$repeat($char(9734),$div($sub($regexp(%popularimeter%,'traktor@native-instruments\.de\|(\d{1,3})\|\d+',$1),$mod($regexp(%popularimeter%,'traktor@native-instruments\.de\|(\d{1,3})\|\d+',$1),51)),51))
Shame there's no function to round down a number, would have been even shorter.