Scrum is just a means to reset play, generally when there's been a handling error. It can be an opportunity for the defending team to affect a turnover if they can overpower the other forward pack, but it can also be a great platform for the attacking team if they have the right field position.
Same principle for lineouts, which happen when the ball goes out the sideline.

When I say "take the points on offer", it just means the opporunity to kick for the posts.
It's far from a sure thing that you'll get another penalty by holding onto the ball. More likely that you'll lose the ball in a collision or a ruck turnover, especially that late in the game when all your players are exhausted.

Ireland dominanting Scotland :O

Hope you enjoy it, if you have any questions you can ask me. I play and watch the sport :) 

Big upset with Fiji losing to Uruguay :O

Hopefully Japan can keep up the pressure! 

I'd expect Ireland to run away with it at some point. Impressive to keep it close for that long though.

Ka-pi96 said: Fantastic! We might actually make the quarters this time

Wow, that's a big upset! 

Amazing.

I thought Japan wouldn't be able to keep up with the pace, they surprised me 

Japan's players have always had great speed and skill for the game, but they've always been dominated in the physical battle by the tier 1 sides. They still struggle with that, especially in set piece and rolling mauls, but they've come a long way and play with a lot of heart.