Because it helped them gain money and popularity.
They can expand their colonies and if they expand and trade more then more people will know about trading. Expanding their colonies was inprotant and their rivals became less popular which caused decline in their trading
Issac newton motion is still used today
Before 1763 the British policy of salutary neglect toward its American colonies was based on on the fact that they considered the colonies to be a direct extension of the Crown.
Because they weren't as Agriculturally based as the Southern colonies were.