1) the alternative portal, cracker.com has also been grabbed - but the new holding page indicates its been closed as part of "Project TransAtlantic VIII" - last years big anticounterfeiting operation
see for instance manchester.cracker.com
makes me wonder if the rationale for this raid is not what we think
2) Backpage tried to have a plan B in place: theres a new site at https://www.bedpage.com/
Some listings seem to have been pulled across from the cracker servers, certainly the sex/escort listings are up and running for the USA, though the UK ones seem corrupt