Agreed. Although, as a person who runs an agency, I do get a lot of emails a day from freelancers. So, you should try to stand out by showing your best work up front and be a real person. Don't try to sound like you're a team of 12 by saying "we" and attaching your company logo to everything. Simply say...
"My Name is protoweek and I really like what you guys are doing. I especially like your app XYZ. If you need help on a project I'd love to work with you. Here are the last three apps I've published. If you need an invite code let me know.
"My Name is protoweek and I really like what you guys are doing. I especially like your app XYZ. If you need help on a project I'd love to work with you. Here are the last three apps I've published. If you need an invite code let me know.
http://www.protoweek.com/app1 http://www.protoweek.com/app2 http://www.protoweek.com/app3 "
Something as simple as that usually gets my attention.