That is one issue, indeed. But the downside is that you're hassling your users to give you money, rather than hassling advertisers to give you money. I'd rathe

That is one issue, indeed. But the downside is that you're hassling your users to give you money, rather than hassling advertisers to give you money. I'd rather not be hassled as a user. I would also click on adverts, and buy things if they're useful to me, but I don't think I'd ever donate to a website.