More to the point is there any evidence of the mainstream porn user actually adopting SpankChain (or any of the other supposed "blockchains for porn") as opposed to ICO profiteers adopting pornography as a relatively plausible potential future business model to sell unnecessary tokens at an implausibly high value?

Just had a look at the company page of the service. The CEO is a "decentralization laser gun" who boasts about how much money he raised in other ICOs (hmmm...) as well as his favourite computer games. In lieu of an actual testimonial, we get him in blockquote saying "we've honestly got the best team ever". Apparently this is one of the more promising ICOs and yet it's making me feel the SEC parody ICO site was a bit mild...