I have put zero money in and my cards are worth a ton now!
Now it requires putting money in to make anything significant in my opinion - at least if coming from the western world.
I only play a few days per season, then rent :)
The SPS airdrops have been badass!
Definitely for those who got in early. For me, not so much, since it is a return on quite a heavy investment, so it take far longer to actually cover what I put in. I am nowhere near yet I think :)