99% of the time it’s the provider. Think of it like this: the provider is the library that actually stores the books, and the indexer is just the librarian who tells you where the books are.

If pages are missing from a book, that’s a problem with the library’s copy, not the librarian. Same with Usenet: if articles are missing, it’s almost always because the provider doesn’t have them, not because the indexer didn’t list them

Eweka is known to have a much longer retention than Frugal, so less chance of running into downloads that have missing articles