Tandata.io Advertises their prices as 1.53/m, But only if you pay upfront for 3 years.
This is sneaky, but everyone seems to be doing it these days.
They in big letters advertise €1.53 per month, but on checkout you discover they don't offer any monthly payment plans, you can only pay annually, and paying "only" one year upfront the price is 36% higher.
For the price you thought you'd be getting you need to pay 3 years upfront.