If the model isn’t worth the cost for those who might want to make use of it, then it can’t be that impactful either.
One thing to compare to would be what’s been paid for bug bounties in the past.
Bug bounties don't reflect the market impact of the vulnerability though, just the amount needed to incentivize white hats to do research they wouldn't otherwise (or that they would target to other platforms that pay higher bounties). You need to look at market prices for zero days on the black market to get closer.
We've had such models before. GPT Pro, Gemini DeepThink. Mostly targeting science advancements as opposed to security research, but still, in a way Mythos is just more of the same.