Good point. The seaweed might have a few extra "nutrients" in it these days. I saw one study that found high levels of arsenic in 8 of 9 off-the-shelf kelp powder supplements. If that don't make you a land lover...
I bought a small bag of kelp noodles a couple years ago and I only bought it once because it didn't taste very good and I didn't even finish half of it. (It was like eating a combination of rubber, salt, and water. )
Zuchinni pasta however is so good that I literally ate a HUGE container of it every single day for almost a year straight. (When people saw the container that I put it in they would say, "There is no way that someone your size is going to eat all that your self.") If you haven't tried zuchinni pasta yet please do so...
If a person can afford kelp noodles I would think that they could afford a spirilizer as well.
Plus zuchinni is so inexpensive!
Also keep in mind that like real spaghetti noodles, kelp noodles don't have a whole lot of flavor to them and by themself taste like nothing. It's the texture of spaghetti and the sauce that is added to it that people enjoy.
For 5 weeks I dramatically increased the number of miles I ran, while maintaining the same diet, to see how that would effect weight loss. The common view is that it's battle of calories in vs. calories burnt. is it?