Is It Safe To Put The Texans In The Snakebitten Franchises Category?

Exactly. Cant blame the dude at all for taking the money. What if he turns them down and then has a career ending injury? He just missed out on $111,000,000 guaranteed. You'd have to be pretty dumb to turn that down.
Dak is walking that same path. If you have questions about the franchise you don't sign a long term deal. It's like buying an expensive ring for someone you don't know you want to marry.