According to Bangkok Post (Professionals interested in working remotely from Thailand must prove they have annual income of at least $40,000, a master's degree or higher or rights in intellectual property, and five years of experience in a research field.)
Also the link you posted says
Work-from-Thailand professional: Foreign workers with employers outside of Thailand, more than five years of working experience and make at least $80,000 over the past two years.
It does not say anything about investment. Of course, I see differences in salary between BP and your links.
It seems the so called "nomad" visa does not require investment. It only requires an MS degree (or five years of experience with stake on an IP like a patent. I have both an MS and patents) and a meagre 40K USD/annual salary. Even if they require 80K USD incomes, I can qualify.
With 40K USD, I can see a flood of people, working remotely for US companies to move into Thailand. I know scores of top US companies, like MS, Intel, Oracle, Cisco, etc. are already hiring Indians for remote work with a starting salary range of 60-80K.