Yep, spread trading can be quite profitable. From my experience, I've seen more of these types of trades and in larger size in the futures. Link below:
https://www.bloomberg.com/news/arti...-20-million-profit-on-hawkish-fed-options-bet
https://www.bloomberg.com/news/arti...-20-million-profit-on-hawkish-fed-options-bet