The DEMO version only includes 4 pages:
https://www.insty.me/plans.html
https://www.insty.me/plans.html/index_html.html
https://www.insty.me/plans.html/insty-power-vps.html
https://www.insty.me/plans.html/insty-pages-our-builder.html

It is possible to download these free files and install them on your server, so you can test how the site works.
Visit https://www.waybackmachinedownloader.com/en/buy-wayback-machine-downloader-recover/ to buy a fully functioning site.
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