Doesn’t work and Pricelist is incorrect

I installed this, but keeps trying to sell me a subscription. Utterly worthless. Didn’t stop a single spam message. Thought I’d give their paid service a go, $9/month isn’t too much to try. Unfortunately, the advertised price is no the list price for their pay service. Doesn’t matter how much it is, but the manner that they are trying to get a sale, by dishonesty.
I queried them about it and got a rude response.

So worthless plugin that tries to flog a pay service that advertises an incorrect price.