You should not be buying Twitter followers in the way that you would think.
I mean, why in the world do you want a bunch of bots with no real engagement?
What you should be doing to buy Twitter followers is this:
Twitter Advertising
The awesome part of Twitter Advertising is that you get both branding and engagement.
For example, here is a tiny ad I recently did:
I got 3,426 people to see my brand (not this site, a stealth project)!
And – I got eight new people to follow my brand.
I pay for each person that follows, but the branding exposure is free.
You can easily see how this loop can get started and continue.
The more followers – the more income.
The more income – the more advertising you can afford.
The more advertising – the bigger the brand and the more followers.
As I said before: