Even if you're not a member you can still get purdy. all you need is any 2 dragon fruits and any moon orchid. You can get them at the moshling seeds shop in between Yukea and the Gross-ery Store.
They may have had a paid membership and then changed their membership to the free Basic Membership. When that happens, they get to keep two moshlings, so they are able to keep moshlings they had on...