But that's the point - they claim it's fine for everyone, even those with allergies, but then formulate the product with known allergens. And now, with the new formula, when people are complaining of sickness they're saying it's a potential allergy or sensitivity to algae.
Their product pages all clearly state that they are vegan, lactose-free, nut-free, but are not organic, not certified kosher, not GMO free, not allergen free (“contains soy & gluten”), not gluten-free (e.g. “less than 20 parts-per-million (ppm) of gluten but does not meet the Celiac Support Association gluten-free guidelines.”), and have a list of all ingredients.
Your complaint seems to be about one sentence on the marketing page for their original pre-order campaign in 2013 (as seen at the internet archive here https://web.archive.org/web/20140506133101/https://campaign....), which was based on a different formulation of their product without the current problematic ingredient, and didn’t list any detailed nutrition information at all, instead explicitly directing curious readers to their other web pages / blog posts for more information (including a full list of ingredients with the note that the product contained soy).
I don’t quite understand why you think their new product version in 2016 should be considered to retroactively make their (no longer existent) page from 2013 false advertising.
One-size-fits-all caps usually don't make you sick. The bar (and corresponding regulations) is much higher when you're selling food, especially if you're claiming it replaces all other food and is somehow also good for various medical problems.