It looks like Microsoft may well act upon the rather ridiculous pricing scheme for Lumines Live!, as Xbox.com forum member Dj LoneStar fired off an email to Xbox Customer support, and got some interesting news back.
Thanks for contacting XBOX Customer Support,
Luminous Live is known to have some issues regarding unsatisfactory in it's download. Please wait until Monday to see wether we have any updates regarding this issue. Do not download or purchase anything else that has to be dealt with Luminous Live. Until then, feel free to contact us via telephone for any updates of this issue and what we can offer you.
For any questions regarding this issue, please contact Xbox customer support on http://www.xbox.com/support/contact/
Thanks for time and support,
XBOX customer service team.