I scale my giving based on how valuable I find the post/comment and how much I would like others to see the post or comment.

1 sat = mildly interesting
5 sats = interesting
10 sats = very interesting
20 sats = extremely interesting, important
50 sats = Others need to see this
100+ sats = Awesome post/comment/user, very much appreciated

1 sat and 10 sats are what I give most commonly.