It's said that a comma shouldn't be placed before a dependent clause when it comes after the independent clause, but what about when the dependent clause is non-restrictive? For example:
"I can't go shopping today, since I have no money."
In that sentence, "since I have no money" is the dependent clause but it's also a non-restrictive cause, right? If so, would it be wrong to have a comma before it? I've always heard not to place a comma before the dependent clause, but what about when it's non-restrictive? Would it be adviceble to have one? Somewhat like this sentence:
"I'm a fan of his writings, though I don't really keep up with that he's doing."