Increasing APR to 20% would definitely make some noise in crypto space and may also serve as a marketing strategy.
I agree with you that it is a market strategy and a good one at that. This will make the hive system highly sort after. People love to be where there is value. And if they can get as much interest by saving, I am not sure the block chain will be ready for the outburst that will happen.
I mean, I guess it's a good strength test if we can in fact get more interest from this initiative.