Is OpenDNS even as relevant as it was earlier, before Google DNS appeared (and then OpenDNS was bought by Cisco)?

Maybe not _as_ relevant, but still a considerable number of clients are configured to trust OpenDNS, and their far more ambiguous stance on what exactly this is for is appealing to some people. For example, OpenDNS says yes, absolutely it is their business what you're looking up, and maybe you are a Concerned Parent™ who wants to ensure their children don't access RedTube, so that feels like a good idea.

I was thinking more along the lines of their SME offering. DNS filtering is an important layer in network security and CloudFlare’s position of being in the middle of a large portion of Internet traffic, alongside now trying to attract a chunk of general DNS queries, potentially gives them a great deal of insight into who the bad actors are.