So some of the investors went ahead and said "coinbase offered us some stuff, we bought them with our own free will, and lost money, so we blame coinbase for giving us an option to be able to buy these things". That is literally the situation, there is nothing further than that, some idiots went ahead and bought some shitcoins nad lost money because of that, and they are claiming that coinbase should be held responsible. Doesn't make sense at all, but usually when people lose money because of their own stupidity saying "I am stupid and that is why I lost money" is a very hard thing to do, so they start blaming others, it is human nature.