https://www.reddit.com/r/motogp/comments/8m1rot/zarco_rossi_didnt_block_me_at_yamaha_article_in/
From the horses mouth...
Yamaha didn't propose me anything for the future. I thought I would've had contats at the end of 2017, but it wasn't the case. There were rumors saying Valentino may have blocked me, but I didn't think so. I respect Vale to much to think so and I know that even if he's important inside Yamaha, the Japanese are the one who decide. So, no one close the road to Iwata for me. It's just that Yamaha wanted to work with Vale and Vinales and plan the future with them.
Shhhh don’t present facts to the mouthbreathing brigade! Their little hamster brains are gonna go up in flames!