The deal with a sponsorship with Line is that it based on your local area Line rep. It's a submission of a "sponsor-me-video" sent into the main office in burlington vt which is then distributed to the reps around the country based on the place from which the person who submitted the tape is from.
Skiing is a large factor in a Line Sponsorship but not the only one. The purpose of a sponsorship is to promote the product. Sponsored skiers do just that, they blow up their local spots with Line products, reppin' the product at comps, demo days and everywhere else.
If you're rejected for sponsorship by Line, it's not neccessarily a "you suck at skiing" slap in the face. It's probably because your local rep has a full team of riders and not spot on the roster.
And if you've sent in a video, it might take some time to hear a reply because they are sorted by the line intern who is often very lazy and paid in stickers (and college credits) and then sent to the reps.
so check out line's website, so check out this link for my info:
http://www.lineskis.com/team/sponsorship.php
or email info@lineskis.com
www.rightsideproductions.com