It's a maintenance nightmare. And using services like viglink your code only deals with a single provider, like you say, you add a single tag and it works with

It's a maintenance nightmare. And using services like viglink your code only deals with a single provider, like you say, you add a single tag and it works with plenty of metchants. Potentially this also opens for other use cases such as substituting the product name with a link to buy, maybe useful in some specific subreddits.