Since posting my response, I have discovered two things:

1. The ad-forced delay does not apply to Firefox (probably because the pop-under is still present).
2. There is an option to get an ad-free version of the service with a subscription fee.

Therefore, I must make a clarification: I have no objection to sites being profitable, regardless of how irritating I find certain types of advertising.

Now that I know there is an ad-free, paid subscription option, I will almost certainly be availing myself of it.

(note: that doesn't make my earlier statement inaccurate, just incomplete...)

- Woody -