> the goal being to find a novel way to get neural networks to generalize from a few samples
Remove "neural networks". Most ARC competitors aren't using NNs or even machine learning. I'm fairly sure NNs aren't needed here.
> why is the MindsAI solution accepted?
I hope you're not serious. They obviously haven't broken any rule.
ARC is a benchmark. The point of a benchmark is to compare differing approaches. It's not rigged.