Hello,
We have the same problem, we've been using Plastic Cloud for more than 2 years, and we love it, but the data size on the cloud is starting to pile up and as an indie studio the cost of storage is something we'd like to reduce.
We work with Unreal Engine and we have a lot of content, textures or binaries for instance, that we want to keep in source control but do not really care about very old versions, and this stuff takes a lot of space.
I do understand it's also part of your business model to sell storage, but I wouldn't mind paying more for the license if we had a way to control what's kept in the database....
Thanks.