A collection of web comics, where you pay $3 per month to read the archives. (The current strip is free, at least yet.)
This would have been a great idea if
1) you could pay with your usual credit card or VISA, instead of the rather finicky PayPal (which evidently doesn't handle people with un-American characters in their address ... just my guess, since the error message is basically saying "there was an error and you can't use PayPal after all").*
2) the archives strips were actually worth reading; that is to say, if the comics were good. Currently there is 1 good comic (The Circle Weave) and it is a weekly one, meaning the entire archives is less than a comic book yet. I'd wait a few years more before I subscribe, personally, especially since I evidently have to move to a more ASCII-friendly address first.
*[edit:] I know this about PayPal because I tried to use it to pay for a LiveJournal account, not because I've considered subscribing to ModernTales.[/edit]