Free: Contests & Raffles.
Real men don't use studs. Sorry, I couldn't resist. But I also grew up in Michigan and studs and chains are illegal and we drove everywhere. I can see how they would benefit on black ice though. I never had studs and get through just fine. I tried cables on a two wheel drive ranger but they broke and tore off my brake lines so I gave up on that system.
Studded tires actually decrease traction on dry or wet pavement. Not worth it unless you drive a ton of miles on icy roads IMO.
Goodyear duratracs are dot snow tires. Great in snow. Junk on ice like any other tire. Im good in 18inch of snow but ice is slick as ever. Great tires overall.