Vizio's rewards site gives points for activities like sharing/following/liking Vizio and their partners via social media, clicking through to their website, visiting their promotional videos, filling out some info about yourself and your TV setup, etc. Some, like the daily sign-in, are repeatable.
There aren't a ton of prizes but they include some Vizio merch, televisions, soundbars, signed sports merchandise, etc. The electronics are expensive and in very limited quantities, but the standout prize for me is 3 months of Netflix for 40,000 points.
Signing up will yield 10,000 points and running through available activities of 25-250 should get you almost 1/3 to 1/2 there today. I expect to redeem Netflix and finish up there as you can only redeem it once and everything else seems out of reach or not something I'm interest in.
You can sign-up here.