[Semaphor]

> You're only allowed up to 10k queries per day, so you can't really use it to build a competing search engine.

But Kagi.com uses Google (+ Bing), they almost certainly have over 10k queries/day

[danskeren]

I don't think Kagi is close to that amount of traffic to be honest (although I'd love to be wrong, in which case they might bypass the limit by rotating between different Programmable Search Engine accounts).. I mean they require signup and even then limit to 50 searches/month unless you start paying $10/month, which is totally fair but a very high barrier of entry.