Flimsy anecdotal account. Funny that this person's Fiverr account has gigs like "I will develop a web app for you (starting at $20)", which for me epitomizes the "rush to the bottom" that the writer bemoans.
It is better alternative than upwork for people with niche area development skills.
Clients come to you instead of submitting proposals. Fees is a bit high but that's fine.
So instead of you submitting a proposal you make a profile and they come to you. So... How does that change the dynamic of cheap asses only hiring the lowest cost workers and workers racing to the bottom?