Every company have their way of going Abuja their marketing and can chose whichever method they deem fit to achieve their target. Running a signature campaign here will depend on how big they are and if they have the finances to fund that but it will definitely worth it as it will show that they are serious. It's all about what they consider important to them and that is where they will channel their marketing resources to.
A signature campaign is certainly a smart marketing idea but it is also a choice to make, plus password recovery is different from other campaigns here, you need to have problems with your wallet to require their services and that doesn't happen everyday and they haven't exactly said anything against starting a signature campaign anytime in the future
I believe starting one would definitely increase their reach though.
Seeing a signature campaign from a wallet recovery service is very strange because people that have problem with wallet recovery issues are minimal and it's not like regular campaigns that we do see large numbers of people subscribing and carrying accounts to test the signature of campaign websites for their functions and some other things.
This is a wallet recovery service and for you to test the service, you must have issue with your wallet whether forgotten password or incomplete seed phrases.