Normally I can eat a bit (100 kcal per bag is actually a bit too much for me…) BUT if I fancy the stuff, yeah, it could happen. But an opened bag/package is VERY different from a closed one for me. I just have the situation when a portion of food triggers a too big desire for more and if I know where I can find more, I eat more… So it depends on the person and the situation if it could help.
I dislike extra package so I wouldn’t buy such a thing, I could put it into boxes or whatever myself, that works almost as well for me (if I even hide it. hiding from myself isn’t nearly as good but something, works when I am not very triggered).
But then I MUST eat that 30g in every 7 days and lose even the slim chance to do carnivore for a whole week … Okay, it’s my personal problem 
And it would horribly annoy me that I have food and I don’t have full access over it… I like to feel free.
We often have 3-5kg peanuts in the house (with one big transparent jarful in an open shelf of the kitchen. I am almost always in or near the kitchen and I am food addicted with extra love towards peanuts), I have way more walnuts (okay, most of them in their shell but I break them regularly), almonds, cashew and now pecans too… I had to learn to moderate myself. Peanuts didn’t go that well so I need carnivore to be safe… But I never ate up a whole bag. That’s 500g, wouldn’t have been nice. My SO uses them as a meal. He is vain and good at moderation, apparently. He eats like 110g now? He had 250g portions in the past but it was fine as he needed his calories and he isn’t like me, his body never complains and it even satiates him. It’s stupid, enjoyable snack to me, not proper food and definitely not a meal.
But we don’t need it in some cases… There is a too big amount for everything but we just can’t overeat some things… Or not alone. I mean, if I have a big enough variety and a big enough eating window, I tend to overeat but I just use a few rules, a more limited selection and it won’t happen. (How I enforce my own rules, that’s another question. I am willing but sometimes I change into another person who doesn’t respect the original person’s rules… Sigh.)
I couldn’t eat that much cashew, 10g would be a stretch. It’s too sweet and too soft. I prefer the salty crunch of the amazing (and even cheap!) peanuts… But my body decided it’s not for it. It’s the only low-carb item where I have this, why? Oh well, it’s too fatty so it’s good I have a reason and way to stay away from this super tasty snack… (Or I can eat one, I have the taste joy and then go for cheese whisps to get crunch, I need a bigger amount of that…)
I overate cauliflower on keto so had to ban it except in soups… But that’s me. I loved my cauliflower.
I COULDN’T and didn’t want to avoid peanuts until carnivore. It would have been some sacrilegious idea…
Taking my precious lovely tasty crunchy peanuts from me… But I couldn’t do it anyway, not even when I knew it was a bad idea at 2am… (But 9pm is bad enough. I become a different person when I start to eat late, outside of my natural eating window. Lots of peanut eating happened there. Chocolate too. And worse…)
We should figure out when we are in the biggest danger and if we can put steps against it, we should. Eating enough proper food during the day is quite important for me.