This is an easy technique I’m using since a year and is still working fine.
Step 1
Use a VPN that allows you to connect in a country where Tidal is available at a lower price. For ex : I’m using Romania or Hungary
Step 2
Create a new account and go to the payment screen. Choose the HiFi Plus, that costs for example in Hungary 2999 Ft (= 7,51$), but try step 3.
Step 3
I would suggest you to fake a student document, you can use the Student subscription for 1499 Ft (= 3,75$)
Step 4
You can disconnect and use with your real IP address now. Enjoy your music in the greatest quality you can have with a streaming service !