Some mobiles can be used both ways.
Take the £60 offer. I'm assuming because they made it you have no points on your licence already - so it keeps you in the clear, and if you stay that way for three years then offend again (under the 'right' circumstances), you'll be made the offer again.
I guess you could say that if you spread you speeding out over the years, and keep it minor - you can still stay with a clean licence.