At some point, SHARE users may wish to vote (either on snapshot or in a compound-esque onchain vote).
It would be bad to see these users get their voting power burned if they are only interesting in holding and voting.
A solution is to add a function to “bind” Share, which prevents it from receiving positive rebases. When a Share is “bound”, it cannot be transferred, but can be used to vote.
When you want to transfer the Shares again, you can “unbind” and subsequently move your Shares and experience rebases again.