I am too is not in favor with invasive type of marketing strategies being implemented by many companies online or offline. The best marketing will always be permission marketing where both sides know the parameters of what they are doing and there is no coercion whatsoever...convincing people has to be based on merits and not on hypes. Now, we already have some marketing companies about to use the blockchain technology for their platforms and hopefully there would be a new day dawning for the marketing industry -- with the help of the blockchain, that is. I am not a good marketer but am always fascinated with marketing strategies that work and of course those that don't so we can learn from them. Block chain as applied in marketing will be a new frontier and I understand there are some ICO projects along this line...let's see how things will be developing on this as we know that marketing industry is a huge one and definitely one of the industries we can't help but experience everyday.