-- custom / topic search, or what we call branches --
tl;dr -- free version makes it easy for anyone to build, use & share custom searches; premium version is zero ads + better web alerts + easier access to alt web indexes
1. average user unlikely to go through config of custom search
2. even if they did, it's so poorly documented & finicky, they'd be unlikely to achieve comparable outcome
3. Bing CSE is even worse -- requires Azure account, limited to 400 up/down boosts, etc.
4. there's other technical reasons a user might not do more than a couple, along with the sheer scale issues that also mentioned
5. we're refactoring how the topic searches are experienced and making the topics, which we call branches, a more natural part of search experience
6. "blogs" is the first one to be done that way -- you can filter to just blogs after searching for X - any other branches / topics will be added in that way
7. e.g., podcasts & RSS feeds are coming out soon, along with more traditional filters such as shopping
8. that approach also makes it easy for us to expose what we're calling a low-code builder to let anyone build a custom search and either share / make public or keep private
9. that includes all possible filters - advanced keyword combos, site inclusion / exclusion, URL patterns, schema structure, etc.
10. premium for users includes zero ads, alerts, and some other features that are mix of TBD or too early to build
11. premium for teams includes similar things, along with the ability to config dashboards of searches, e.g., an HR dashboard of relevant custom searches, etc.
12. we're navigating that labor balance -- e.g., the blogs filter is fairly basic atm, whereas filtering college scholarships was a bit more nuanced to make it work