[logfromblammo]

That will increase the ratio of revenue-generating users to gratis users by reducing the overall number of users.

I recommend implementing a friction-free way for people to support your site, at whatever level they may feel comfortable with. Then you can occasionally remind readers that the continued quality of the site depends on you being able to pay for both it and your rent/mortgage.

Make a page that allows people to give you money via Patreon, Amazon Payments, PayPal, Bitcoin, Rixty, Venmo, and whatever else may be convenient for you. As the revenue from those sources allow, gradually remove the ads, and try to make it obvious that some ads went away because of increased direct patronage.

If you still want some ad revenue, you will probably need some way to do direct ad sales, and embed your paid endorsement into your content somehow, in a manner that is not off-putting to your audience, while also publicly disclosing that you were paid to promote something.