The site is Liturgy Help Online, and it is, in fact, a subscription service. Here's the reader's analysis:
"Now, if I understand things aright, liturgyhelp.com had to get the US bishops' permission to publish English texts on which they hold the copyrights. ICEL owns some, and the USCCB owns some. Down in Australia, their Bishops' Conference owns some.
But lest anybody get too sanguine about how helpful the bishops were or how convenient it will be to have authoritative English texts in one handy place, please note that the subscription fees start at $365 a year, some of which goes back in the form of royalties to ICEL and the Bishops' Conference.
I guess that explains in part the USCCB's willingness.
Do remember to destroy the printed copies you make after you terminate your subscription to the service: that's in the terms-and-conditions agreement.
I guess you can't buy the sacred liturgical texts through liturgyhelp.com: you can only rent them."