Rentals will be a massive boost to the whole splinterlands eco-system. The old rental market didn't work well and people still used it. This new one is so much better and fit for purpose that a lot more will get involved with it.
Even myself will rent a few legendary monster that i don't want to buy but will rent out more lower level ones to pay for it. That could be 100 cards moving on the market from one user.
It has a big future and will make the game a lot better for small er users that can now rent out expensive summoners for a small amount of dec and go up the levels to grow.
I'm a huge fan of what has been built.