How to handle this request for chipping in on a birthday gift?

Someone at my book club sent out a group Facebook message to members saying: "I've purchased a sweater for the book club president for her birthday.  Anyone interested in chipping in,  LMK.  There will also be a birthday card to be presented to her along with the gift."  The message was sent on Friday and I didn't see it til after the weekend.  The gift buyer then wrote in another group FB message:  "8 ppl expressed interest in chipping in on the gift.  So those ppl should venmo me $10."  My question:  I would have liked to have chipped in for the gift and to have signed the birthday card.  But I didn't find out about it in time.  How might I handle it?