For starters, CPAC is not what it was thirty years ago.
Secondly, fundraising has NOTHING to do with how conservative a person is.
And finally, Rand Paul isn't conservative on ANYTHING, he's a libertarian populist.
Any chart that puts Rand Paul as the most conservative of that group has no chance of being correct. He belongs somewhere on the left side. The only black mark I remember about RR from his run in 1980 was allowing his advisers to sway him into signing a law allowing abortion if the pregnancy was a danger to the mother. He never saw how that loophole would become a barn door; a mistake he repeated on legalizing aliens as president.