Thank you for pointing this all out. It has been like screaming at a wall when it comes to this. There are several bot seller networks with dedicated win trading bots feeding them cards to sell. It's easy to root out the entire network on the Hive Blockchain, the challenge is to find ways to isolate them from each other.
The new rewards were a surprise to come so soon because the win trading issue was never resolved and there's no will to resolve it. There is an obvious fear of a massive drop-off in DAUs and asset dumping, which could result in the game's demise.
The SPS Node Licensing also was rolled out too early because of the same issues you presented. They have an existential threat in the ecosystem, this security issue comes first before the further decentralization.
I can understand why SPS continued to fall as low as 7.8 cents.
There's a lot of grift with Splinterlands (especially here on PeakD) and the lack of real players joining the game is disconcerting, they are doing everything they can to make up for the poor marketing outreach.
RE: Splinterlands Bots are Back: Discussing Rentals, Rewards, Win Trading, and Centralization