@tychosoft where did 70% come from, though? Every auditable study that I have audited that has huge numbers of bots like that ultimately falls apart on audit. I was interviewed about that in the New York Times a few years back. The available mass analysis tools are incredibly flaky and don't stand up to scrutiny.
@tychosoft btw that 70% sparktoro number is absolutely wrong for many many reasons I may go into later - they refused to allow me to audit their work when I asked, too