I'd hope that the incentives are in place to encourage high volume senders to be more efficient in their use of block space by batching transactions and implementing SegWit, though this may not be the case for providers that pass transaction fees along to their users.
We've been trying to be more proactive about outreach regarding efficient use of block space to our own customers at BitGo - when we break down the cost savings of implementing a new technique, it generally helps to hasten their adoption. I suspect that in many cases this is an issue of education - we should be more proactive in calling out inefficient uses of block space.
Good resources to bookmark and share:
- Jameson