I was never going to have one until our engagement scored us about 5 more photo frames, and 3 different sets of white wine glasses plus other non personal gifts. We had only bought our house 6 months earlier but had been living together for 3 years before that so we had all that and more.
My poem was printed onto a small envelope so people could just put that into the well if they wanted but most enclosed it in their card. We had small and large amounts and I couldn't tell you who gave what, I can tell you what we spent the bulk amount on and we are still appreciating those items nearly 5 years later.
When I've been a bridesmaid and haven't had the cash to do as large a gift as I would have liked I have put in $50 and added a small gift.