Dude, I think it's overpriced everywhere with restaurants in general. Unlimited fries are incentive for me to eat there honestly. They also have incentives for me with buy 9 burgers, and get 1 free along with a free burger for your birthday month as I previously posted.
I also eat at Islands occasionally, but only if they have a triple points, or also double points promo to expedite getting a free burger. They rarely have discounts though. They also have unlimited fries too.
Most restaurants are overpriced with smaller portions and they don't offer unlimited whatever. I doubt I'll ever eat at a steak restaurant again in my life because they are too damn expensive for a plate. I learned how to cook steaks at home since lockdown life started almost a year ago after I got some cast iron cookware. And I save a hell of a lot of money, especially being on food stamps.
I normally have 2 baskets of fries, or sometimes 1.5 baskets depending on how my stomach intake is that day, along with the fries that come with the burger at Red Robin. I mentioned I try to eat like a Rottweiler.