Anyone who owns 99% of compute capacity can distribute a patch to the "distributed" network forbidding blocks mined by "unauthorized" or "unofficial" clients, a

Anyone who owns 99% of compute capacity can distribute a patch to the "distributed" network forbidding blocks mined by "unauthorized" or "unofficial" clients, and since that person's 99% of the compute power constitutes a majority, newcomers are effectively locked out. Blockchain's dependency on distributed computation remaining democratic with a diverse range of self-interests is axiomatic to the model.