They'll finish it no matter what. Tomb Raider didn't sell as well as they had liked and they made two more games. They'll know it's diminishing returns over time but they'll also know that this is a no-brainer that they have to complete it. The game will sell easily.

Also, I'm only up to Wall Market and I have already got my money's worth. I'm actually astonished at how well this game has turned out, I wasn't expecting it. This game is genuinely good. Some people might not like that they turned 8 hours into 30+ hours but I'm delighted they have, and I know many more feel the same. They have fleshed out this game and the characters to the perfect degree, and I can totally see why they've done everything they've done so far through my playthrough. No overdosing on sidequests, either... they just throw six in every few hours and that's it.

I can't say for the later parts of the game that I've not played but so far this is a fantastic game, it's getting fantastic reviews, everyone is buying it and most are enjoying it, I don't see any reason at all that they won't finish this when they know all about episodic content from Life is Strange.