I have with Divinity Original Sin 2 and definitely for XCOM 2. For Divinity, it was for some cheat mods (why, idk) and I remember picking up XCOM for the Star Wars conversion and Factions mods.
Is it a bigger selling point than I think it is? Because to me, I mostly pick up games for just that, the games. Mods are usually not that big of a deal in decision making for me personally, more of a nice bonus.