I had a “huh?” moment when I clicked the link, then realized that it was the post-signup page. It’s more obvious what Blisk does on the home page: https://blisk.io/
Ah, sorry about that!
Matching behaviour with dozens of mobile devices means matching old browsers, not updated, means vulnerabilities.
As long as you only use this to access sites you own and control, there shouldn’t be an issue, although a site vulnerability becomes a path to developer machine compromise. You really don’t want to use this for general web browsing though.