I think we should be given more benefits for getting married, like being able to give each other all unique untradable gear/items to each other including spirit bonded gear/items, dungeon gear, tomestone gear, upgrade items etc. Also being able to give each other tomestones but up to a certain limit weekly.

To prevent people from abusing this you can have it so that when they try to divorce, they have to return all the tomes/items/gear to each other before finalizing the divorce if they haven't been discarded or converted.

I believe doing this will give people more incentive to take part in. This could be a Platinum Reward as this will not allow people to abuse it if it were free