@Fauzia Hi. Having completed SFG and qualified for prelims 2023, I perceive that you view SFG's tests just like any other test series. You don't pay for the questions here, but something more.
I won't delve into the economics of the program, but I believe SFG transcends those 50 questions.
Personally, the thrill I experienced during SFG was unparalleled. Sometimes with little to no sleep, and occasionally only four or five hours, slogging to secure a top position, I had never exerted that much effort in my entire life, not even 50% during Mains preparation this time.
The programme for me, was less about having a high hit ratio in the real prelims. Rather it was about cultivating the crazy dedication to prep that makes you go, "Damn, I can do this." A level of achievement I believed I can now never attain (unless I join this year's SFG, in case I don't qualify for the interview).
I mean, as I look back, given the whole package of SFG, the costs looks fine to me. Else, one can easily find the test papers, the same day, sometimes within a hour or two, in the bookshops or on telegram(at a little to no cost).
Peace.