After testing out the Tree of Silence (ToS for short), on Beta, I'm confident that Inno has made the right decision. Placing it behind a paywall and limiting the maximum ToS a player can obtain, I think it'll ensure the balance. Renovation kits are supposedly rare and highly valuable. A one up kit is a bit less valuable. Since a Reno can bypass multiple ages at once, a 1up kit can't. Besides that the ToS offers 2x frag every 2nd day on average. All by all the ToS would be ways too powerful to become farmable. As where the ToV isn't that overwhelming good; much better and more efficient options exist and directly successfully competing with it. For example the boathouse of last year's summer event.