Beside this, can YouTube tell if you buy views?
Buying YouTube views is not illegal in any way, shape, or form. It should be noted that there are some tactics that are against YouTube's terms of service (TOS) such as bot views or tricking people to watch a video, but even then they are 100% legal. Your video will not get deleted or removed because you buy views.
Also Know, how much do YouTube views cost? The actual rates an advertiser pays varies, usually between $0.10 to $0.30 per view, but averages out at $0.18 per view. On Average the YouTube channel can receive $18 per 1,000 ad views. This equates to $3 - $5 per 1000 video views.
Beside above, do you still get paid if you buy YouTube views?
YouTube and Google are both very smart in keeping their money and bought views do not interact the same way as natural views do, so you won't earn money and could actually get your Adsense account banned if you try it. So be sure to disable Ads on videos you're buying views for. However, you can make money indirectly.
Is it illegal to buy subscribers?
The ONLY time YouTube will act against you or flagged your channel can be if you'll upload offensive content. According to YouTube Terms of services, buying subscribers isn't illegal which means, NO, you are not going to get banned, and YES you can buy subscribers but, you have to do it carefully.