How does Boost.ink help me gain subscribers, followers, likes, etc.?
When you short a link, e.g. a download or an interesting site with Boost.ink, all users first have to do whatever you want them to if they want to continue to the target site, like subscribe to you, or like a video of yours.
If a user performs an action one time, will they have to do it on a different shortened link again?
No, Boost.ink remembers all subscribed channels, followed accounts, liked videos, etc. and will automatically mark these steps as done across all shortened links.