Oracle Data Quality, in terms of scalability, is good. There's no doubt about that. Tools offered by Oracle have very high scalability, which includes Oracle Data Quality.

I have found this solution to be scalable but the scalability is dependant on the hardware you have on-premise. You are only limited by the physical hardware you have. If there was a cloud offering scalability should be part of the public cloud design offering.

This solution can scale with no issues. All of our customers are enterprise-level organizations, although I do know of some medium-sized companies that also use it.

No.

No. Product is very scalable as long enough database space and application server memory and CPU provided.