You can't join connections just by visiting the website, which is odd. I had to go through blink.com to join.
And as far as ordering, I didn't think my vouchers went through either and I ended up getting charged $145.....FIVE TIMES!!! Luckily, I was checking my credit card balance that day and found out before it was too late. I really didn't need 50 quick and casuals and 10 breakfast vouchers!