This is a jukugo word that uses the on'yomi readings of the kanji. You haven't learned this reading for 追 yet, so here's a mnemonic to help you:
They get you to follow them by yelling TWEET (つい)! Birds tend to follow each other, and something about hearing them tweeting at you makes you feel like you have to follow them.
This company is unrivaled by other companies with its overwhelming strength.