I'm still not quite clear what qualifies this as "spam" given that you need to opt into viewing the tweets. It seems like a clear-cut case of impersonation. Spam is an entirely different concept that cannot be reduced to "I don't want to see this content" (which would, again, necessarily include ads...).

Granted, I would consider 99% of what pg would likely consider "legitimate" cryptocurrency content to be de-facto spam, but that's just a part of being on the internet at this point. The problem he raises seems negligible in comparison to the other commercial content that pollutes twitter.