my theory for this 10th board scandal and difficulty in sets

Firstly I didn't know which tag this comes under so I'm keeping in discussion.

Now lets talk about this "amazing" paper TOI calls. From the disparities of sets 30/1 and 30/2 with BPT 5 MARKERS to 30/3, 30/4 and i think 30/5 but i haven't heard about the last two sets very well with an 11th grade case study. I would say its for profit, just hear me out here.

i would not call CBSE notorious for being profit-based though its owned by the government, in such a capitalist world im not THAT surprised, just for context, all of us know we 10th graders have 2 board exams, and our first one went...questionable. We also should know there is most likely a second LOC reg cost for for the second board exam. Now, when mass amount of people haven't done good, its clear they'll go for the second one and for many of us maths is a crucial subject which we wanna score in or taking up streams in 11th. So, if you have a profit making mind, what would you do? Keep a price for registration and considering how many people have cbse, count the numbers for me how high the profit margin could go. Again this is a theory but i thought of this IMMEDIATELY after heading out of the center and didn't have the time to talk abt it.

Also, i had gotten 30/4/1, not as hard as a few other sets (moment of silence for our set 3 people) but comparatively harder than many papers.

Coming to my question, this is for fact checking another theory of my friend. Are the sets based upon region? Like north get --- and --- set while south gets --- and --- set?