Help needed

Heyy guys i want to enroll in the fts test series and they're saying 7k. Like i have talked with multiple people and they're saying to enroll me in it. Although I'm a ex aakashian im confused. So the thing is they'll provide additional discount if i gave psid and receipt of any of my friend who is also enrolled in fts. So it real or fake ? Should i do it. If yes can anyone pls help me in that can that i can get some additional discount?

Also please tell me if this test series is worth it if i have already local coaching test series available.

Please help Thanks