Invited to Best Friends wedding. They asked for no gifts.

So my best friend/MOH is getting married in January and I am so excited for them! They are doing a courthouse wedding and then a dinner reception to celebrate. On their website they specifically mention no gifts. I feel weird not giving them anything. She got me a really nice gift for my shower and I wouldn't be surprised if they also gave something at the wedding. Would it be rude to still give them money at their wedding? I definitely don't want to get them a physical gift that they won't use so I feel like money is always a safe bet. She has done so much for me for my wedding I just feel like I need to give her something.