Not if the social media personnel hired can target users to follow him. An idea that will work would be great, if he intend to acquire followers who are interested to bitcoin then he should start here in the forum but posting his twitter url.
I don't think so. The paid followers are usual in the thousands, poor people in developing countries who will not look at your twitter posts again. This is fruitless!
Yes, that's true. But promotion is good only AFTER you posted some quality content, because if someone has a look at your twitter account and there is no quality content, it's clear to see that there are only shill followers!
In my experience, I did good to slowly build up content and then followed some big names in crypto. The followers will come automatically. And don't forget to follow them back!