They send one as soon as you join. The e-mailed plans have one or two lines of advertising on them. Really not very obtrusive at all and the neat thing is the plans are a surprise. Don't know when to expect them or what they'll be. Some are free and some aren't.
Plans are adobe format.
Can't go wrong by checking out this site. A good site with some free plans. They have a plan of the month club and go way beyond just selling and giving away plans. They also help you figure out how to plan ponds and other interesting home projects. Worth a look.