It's like a warning! if you get so many strikes/warnings your contract may be terminated aswell as your YouTube account
No. A copyright strike does not disable monetization on the first strike (at least not when you're in a network). It removes features such as scheduled uploads, live streaming, etc.A copyright strike is nothing like a warning, it's a punishment. It disables monetization for 6 months and the network will be required to terminate the partnership by YouTbe.