Statelessness.eu offers a contrary view, focusing on the incredibly high, sometimes unmanageable, application fees for regular families.
Here are the key insights from recent, interesting articles on this topic:
Intime Immigration breaks down the costs, noting it is a very expensive, multi-year process.
While the UK does not offer a direct "cash-for-passport" scheme, several insightful blog posts and articles explore the "citizenship by investment" pathway, which is essentially a residency-by-investment route that can lead to citizenship.