IMO the various chance-to-win sweepstakes are pure scam because they’re not required to disclose that just 1 in 100,000 people win the $500 prize for an expected value of 1/2 of one cent for each player.
Whereas the value of an e.g. medium order of French fries may be 25 cents cost to the restaurant but is the full $1.59 or whatever the normal retail price is to you.
Now whether the survey is worth your time to earn $1.59 worth of fries is an individual choice. But it doesn’t take a math major to see that $1.59 is better than 1/2 a penny.
My groc store used to have a deal for a $5 off coupon usable on a future visit if you filled out a survey. I figured out how to do the survey in less than 2 minutes = $150/hr wage. Tax-free. I knew I was going to be back in the store again anyhow long before the coupon expired, so no chance of loss or extra effort required there. Sadly they discontinued this after about a 1 year run; apparently too many people had figured out what I had.