Parler was effectively deplatformed in January 2021 when Apple and Google removed its app from their stores and Amazon Web Services suspended its hosting, taking the service offline and severely disrupting its business.(cnbc.com)

Within the following 1–2 years, multiple alternative social platforms explicitly targeting the same right-leaning, “free speech” user base launched or significantly expanded, constituting a clear market response:

• GETTR: Founded by former Trump aide Jason Miller and launched on July 4, 2021, described as an alt-tech social media platform and microblogging site targeting American conservatives, positioning itself as an alternative to mainstream networks like Twitter.(en.wikipedia.org)
• Truth Social: Founded in October 2021 and launched publicly on February 21, 2022, characterized as an alt-tech social media platform created in response to Donald Trump’s bans from major networks after January 6, and explicitly framed as a Twitter-like alternative competing with Parler, Gab, and Mastodon.(en.wikipedia.org) By January 2025 it had an estimated 6.3 million monthly active users, indicating non-trivial scale.(en.wikipedia.org)
• A 2022 Pew Research Center study identifies Truth Social, Gettr, Parler, Gab, Rumble, BitChute and Telegram as a cluster of “alternative social media sites” that explicitly present themselves as alternatives to established platforms, especially by opposing perceived free-speech restrictions, each with at least 500,000 unique visitors by December 2021.(pewresearch.org)
• During Parler’s downtime specifically, Gab—a similar “free speech” network popular with far-right users—gained about 600,000 new users, showing immediate user migration to rival services.(cnbc.com)

These developments show that, following Parler’s deplatforming, a set of alternative platforms both emerged (e.g., GETTR, Truth Social) and expanded (e.g., Gab, Rumble, Telegram) to compete for the same audience and positioning (conservative, anti-“censorship” social media). This is exactly the kind of “free market response” the prediction described, and it occurred well within “the next few years” after January 2021. Therefore the prediction is right.