I've already checked other posts about this on the paper and invites board, but I wanted to get the consensus on it from a more local scale. For the record, a lot of people on that board seem to think it's a good idea and not a tacky move in the most recent post on it...
After changing my mind a million times, I've finally found an invitation set on Etsy that I really like. Part of her store policy is she offers postcard rsvps. I personally like it not only for the little savings in costs it offers but also that it's so eco-friendly. I asked FI's opinion and he thought it seems tacky which is so ironic because I can think of a ton of tacky things he says and does lol! He somewhat changed his mind when I went into greater detail about it...After scouring through dozens of invites listings on Etsy, it seems to be more common and not some random thing. I just don't want guests to think it's tacky when they receive the invitations.