YouTube’s Fake Engagement Policy strictly prohibits artificial engagement. The platform regularly runs "sweeps" to remove spam accounts, which can cause your subscriber count to drop overnight.

If you have a budget, it is technically possible to buy a pre-existing, monetized channel through a marketplace like Flippa, though this requires careful due diligence and escrow protection. The Truth About Buying YouTube Subscribers - vidIQ

Instead of buying fake numbers, consider these legitimate ways to build an audience: