Looks to me like they need to cache search result sets then before it's fair. I have to have an account anyway.

Not to mention incrementally refining a search by adding/removing/changing keywords.

Those limits start to look increasingly low to me. As in, not your main search engine but the option to use when all else fails.

Of course they don't mind because it's subscription pricing.

Kagi already does this, performing the same search multiple time’s doesn’t count against you (from my testing), so they must be caching, or your browser does, not sure.