Best commenter for slave account?

Hi all,

I have a slave that I'm trying to automate so it comments instantly on new uploads from big pages...

I had a feeling this method was dead but I keep seeing accounts using automation/slaves still so it must be somewhere?

I follow them all so even better if it can just comment to feed.

Ideally not looking to spend a lot but happy to pay for a service if it's reliable.

Thanks in advance.