That's total bull*. I've had like 3 free to play accounts and I have never ever gotten anything from the RNG events on them. You may think so only because 90% of the servers are always filled with low power players and it doesn't matter if a single person spin 200 times on the lucky wheel when a server of 1000 players spins one time and someone from those 1000 gets something. At the end of the day it doesn't matter if a single person spins however many times because even he can't compete with the total server population and how many times each of them are able to spin. That's why these f2p or low spenders give you the illsusion that they win more - because in total they actually spin more than the spenders and thus the likelyhood of them getting a reward is greater.

As for OP, you're kidding yourself if you think a person with 40k battle power only pulled 100 times from the summoning treasure. Hell, depending on how old his account is, he could possibly get Kirin from only free pulls, let alone the added summon scroll pulls that he did, as well. The game has a fixed chance, you can't get Kirin or the KOH before he hits the necessary number of scrolls. If it was otherwise, plenty of others would have gotten the rares, as well. That's like saying someone got Madara for 60 scrolls, the game doesn't work like that no matter if you're f2p or p2w.