http://pub.bna.com/ptcj/1051462Jan11.pdf
GDPR-shield's original T&C was actually copied from ShareKit, which is another product from the same company:
But going paragraph by paragraph down the terms, you get this list of companies, all with the same language:
https://www.google.com/search?q=%22Except+for+certain+kinds+...
https://www.google.com/search?q=%22You+must+be+at+least+%5B1...
https://www.google.com/search?q=%22To+access+most+features+o...
https://www.google.com/search?q=%22The+Service+will+require+...
https://www.google.com/search?q=%22may+seek+pre-authorizatio...
https://www.google.com/search?q=%22The+Service+may+include+a...
https://www.google.com/search?q=%22may%20suspend%20or%20term...
That's only through section 4, but so far every clause is legal boilerplate except for the first paragraph of section 4, which is unique to ShareKit (and ThreadRadar, another product by the same entrepreneur).