Would anyone be interested in a scrappy swap? This could be done any number of ways:
... swap one block a month or swap multiple blocks to a list, like the boomerang swap
... make a specific size and pattern, like a 12" nine patch (or smaller) that the enduser could use as is or cut up (eg. a disappearing 9-patch), or a scrappy boxy star, or churn dish. Maybe each month have a new block design. That would end up in a scrappy sampler type quilt.
... set up a swap list like the Friendship Block of the Month where everyone sets up their own theme e.g. simple star, string, controlled colors
The main idea would be to keep it simple -- not complicated patterns, not specific fabrics (eg. all orientals, all juvenile, all I'spy, or even all plaids). The point is to keep this scrappy -- like the bricks-and-cobblestones swap awhile ago. We want to keep the cost down to a minimum with no need to purchase anything, just use stash and leftovers.
No challenging patterns that might scare away newcomers. Need to be as plain and easy as possible.
If this were set up like the Boom-block swap, we could divide the list of participants into groups of 12 (for example, just an easy number), and you send one block of the same pattern to each of the 11 other people in your list. Next time (next month, or everyother month, or whatever), change group lists and maybe change the pattern. It all depends on how fast you want to have your scrap blocks grow.