Tokykopop's New Online Preview Feature

MangaBlog points out Tokyopop's new online manga preview feature, where new chapters will be posted every two weeks:

Tokyopop has reset all the online manga previews on their site to chapter 1. Every two weeks a new chapter will come up and the previous chapter will be locked. (This comes from the promotional e-mail they sent me; the info doesn’t seem to be anywhere on the site.) When you click on a locked video you still get a mysterious message about VIP membership, which makes me wonder what else they have up their sleeves.