I wonder if in the future there will be a subscription service which consolidates subscription services and pays our fractions of the subscription fee to each provider a la music streaming.
I see some sort of reverse consolidation happening in the next few years. Netflix, Amazon, Google, Apple and probably Facebook would lead this aggregation, as they have been doing (or trying/planning to do, as the case may be).
At least one of the apps on OPs list (2do) is included.