manucode

C
CC
CCC
CCCC
CCCCC
CCCCCC
CCCC C
    U
CCCC C-
    U
CCCC C=
    U

How did you come up with such a ****ingly stupid syntax?!

It uses XML-like syntax:

<fun>
  <name>sum</name>
  <in>
    <int>foo</int>
    <int>bar=0</int>
  </in>
  <out><int>foo+bar</int></out>
</fun>

Maybe adjust by the number of upvotes coming from that instance (negatively) and by the number of upvotes users of your instance give over their (positively). If one instance spams upvotes, these upvotes loose value. If posts on that instance are popular with your users, the upvotes coming from that instance are more likely to have been made by real users. Maybe we can find a better metric to estimate the number of real, active users on another instance.