I referred my husband but not for the turkey. We live in different states right now because he is working a temporary job. He wanted to know how he could save a little money on groceries so I gave him my referral code for Ibotta. He said he would sign up today. We plan to donate the free turkey however as I have two in my freezer and I am getting another free one from Giant with my points. It will be easy to deal with receipts as he will have his own and mine. You can't submit the same receipt for both accounts but if he submits his separate from yours it should work for you and your husband.
I would also recommend having each account on separate devices and don't try to look at your account on your spouse's phone.
Though I have seen literature that says you can have up to two accounts on a device, it can cause problems.