I assume if you do click on it it costs them money and helps to fund TTths.
If so I can't think of a better way to reclaim some of the CO2 subsidy cash.
However it is unreasonable of anyone to create a totally intrusive online advert, though that seems, to me, to be the intent of certain types of advert creators and their clients.
Maybe we could have a guide thread for the best way to help fund ttths through on site advertising - who pays most and can best afford to cough up - stuff like that. How many clicks to make the payment active?