I won't add to the AI debate already well expressed by other commenters but one thing i don't understand is why the author has posted the name of the "spammed" product and a direct link to their blog: consider how much did he helped them having new traffic and potential customers
And the common consensus in this thread, which I agree with, is that Wisp is obnoxious, insidious, and is an active participant in the degradation of quality of both email, and the internet as a whole.