There are countless ways that you could be getting subscribers on YouTube however it is necessary for you to understand that the easiest way would definitely by simply paying for them. It would take a lot of effort and time on your part to create good quality videos as well as to solicit viewers to come to your videos and subscribe to your channel and this may not be something that everyone would be comfortable doing.
You may, therefore, find it is a lot easier for you to outsource the process of adding subscribers to your YouTube channel compared to having to do everything yourself. At the end of the day, it all boils down to what you have more of at your disposal between time and money.
If you have more money than time and if you are willing to invest part of your money into something that is going to help you increase your turnover then you might as well want to simply proceed through specialists who know exactly how to direct YouTube subscribers to all sorts of YouTube channels and buy youtube views from them.
If on the other hand, you are just starting out and you are short on finances, then you will find it being more practical for you to spend time researching ways you could be increasing views to your videos as well as learning how to get subscribers on YouTube.