I'd say it's more than suspect, what's the point of agreeing to a terms of service if they can change after you agree to them?
> "Besides the general requirements of 'good faith' and 'balance', the EU rules contain a list of specific contract terms that may be judged unfair.
> Here are some situations where contract terms may be judged unfair under EU rules:
> [...]
> - Terms which allow you to alter a contract unilaterally unless the contract states a valid reason for doing so."
https://europa.eu/youreurope/business/dealing-with-customers...
NOTE: instead of downvoting as a knee-jerk defense of USA, just reflect on whether you'd benefit from some slightly better consumer protection laws.
And even if you click agree there are legal questions about how much that can change about your past relationship, and what kind of changes you can legally make.