I heard last night there are now 18 states in the National Popular Vote Compact. It only works if/when the compact represents 270 votes AND if the popular vote total conflicts with the outcome of the electoral college.
Talk about a conspiracy to interfere in Presidential elections.

Clinton lost partially because she decided to not campaign in states she believed were Democrat "locks". She focused more on the swing states that showed a potential swing to Trump instead. She wound up losing those three because Trump campaigned heavily there.
Changing the rules won't change the outcomes. It'll just means the candidates need to adjust their campaign strategies. If densely populated cities rule the country, that's where candidates will go, offering policies that affect them. Screw the blue collar worker and farmer states.
All that's needed to destroy the compact is a viable 3rd party candidate. That all but ensures no candidate gets a popular vote win without winning the electoral college. I honestly think Trump would win in a complete landslide in 2020 if he decides to become an Independent. It's a little late, now that Republicans hav donated so much to his reelection, but I think voters are tired of the perpetual two-party tribalistic election system.