Complex sentence: When he's not trying to scam a few dollars from his nephew or mooch a free meal, but when the strip's editors pointed out to Bud Grace that no one would voluntarily be friends with someone like Sid, he became Ernie's uncle.
Split into simpler sentences: When he's not trying to scam a few dollars from his nephew or mooch a free meal. When the strip's editors pointed out to Bud Grace that no one would voluntarily be friends with someone like Sid, he became Ernie's uncle.