My use-case is trying to create an "Indie Travel" lens which excludes results from more popular travel websites (TripAdvisor, Viator, Lonely Planet, ...) to try to unearth a broader perspective to my travel planning.
I don't want to permanently block or lower these domains, and I want their results by default in normal queries. Just not in this lens.
So far, I have used up my 10 excluded domains with:
tripadvisor.com,tripadvisor.com.au,tripadvisor.co.uk,tripadvisor.ie,tripadvisor.in,tripadvisor.co.nz,tripadvisor.com.sg,tripadvisor.ca,tripadvisor.com.my,tripadvisor.com.ph
And a top result for "things to do in venice" is from tripadvisor.co.za.
Regex, specifically, might be tricky because of ".", so I guess there should be some way to denote it.
Something this perhaps:
lonelyplanet.com,/tripadvisor(.com?)?(.[a-z]{2})?$/,viator.com
Or maybe even, for my use-case, a more specific placeholder which matches any Top-Level Domain:
lonelyplanet.com,tripadvisor.{tld},viator.com