You need to link me my channel, on youtube, i'll shout you out,
on facebook, i'll send to all my contacts,
on Skype, i'll use a plugin to give your link to all my contacts.
Note : Out of the 1600 people that will see your link (if you select the premium one) around 150 will subscribe.
Depends on what type of channel your running, and its content. As always, you have to have good content to get subscriber, this will surely boost your view's and sub's. If everyone see's my promotions, you will get around 100-150 Subs (If you choosed the premium one)