How do I find advertisers quickly?

lookup.design just went a bit viral on twitter so now I need to quickly find advertisers to hopefully offset some of those algolia bills.
I prefer not to throw in google adsense as I really don't want to compromise the quality of the site.
I also checked some affiliate programs but they all rely on getting paid conversions and I really prefer charging by click.

So far I wrote to a couple of small design startups but none of them got back to me. All the big companies have an affiliate program so I assume they won't make any custom effort for a "small" site either.