I think this is an excellent question that encompasses various aspects.
First, those anonymous informant programs have existed for a very long time. I think they are working relatively well, since there are always some people who are open to providing information without expecting any sort of payment from the government. However, based on my experience and the discussions I have had with individuals familiar with those programs' administration, one of the key conditions for people is anonymity. The first consideration people think about when they call a hotline to provide information is ensuring that their identity will remain secret. Basically, I think those two programs are completely separate to an extent because, in the first case, anonymous informing does not involve a lot of work. The person calls, provides a lead and the authorities, with the means at their disposal, can check the validity of that lead.
However, an official informant program with compensation does require work. The agency will not compensate people for doing nothing or without providing detailed information. The compensation percentage for the informer varies based on the quality of the information they provide and the work done. So I think two different clienteles are involved.
Second, paid whistleblowing mostly has to do with international tax transactions. Those cases are much more complex and difficult to identify than those involving individuals who call in to say that they think their neighbour is buying goods that seem to be beyond their means. I think those two programs are separate. They are based on their own specific problems and their own specific realities.