US couple blocked from suing Uber after crash say daughter agreed to Uber Eats terms
(www.theguardian.com)
It's not really legal in the UK. It's unenforceable on claims under 5k and for claims over 5k the courts will make a case by case decision if arbitration is appropriate.
However, lots of companies still add these bullshit clauses as a way to bully people out of seeing a lawyer.