There are already 5 different bridging proposals on this forum, and all of them fail to explain how they generate growth on ARbitrum or actually expand the ecosystem.
Subsidising bridging does not actually bring more innovation to the ecosystem.
People need to have a reason to bridge in the first place… this is why incentives should be used on protocols that are offering unique apps. If there was nothing to use on ARbitrum, then no one would bridge. A bridge is just a middle-man and at the moment is already very cheap and fast.