Re: Having a distribution monopoly...
Maybe what you have developed isn't worth paying for? Or not worth paying what you are asking anyway. Or maybe you are one of those shitty developers who want paying for the app but then go and stick adverts in as well.
Your app is only worth what people are willing to pay for it, not what you think it should sell at so if you aren't selling enough try reducing the price.
Some of the top selling items on Google play at the minute:
Cut the rope £0.62 (over 1m sales)
Swiftkey Keyboard £2.99 (over 1m sales)
Officesuite Pro 6 £9.60 (over 100,000 sales)
PowerAmp £3.25 (over 500,000 sales)
As you can see, there is a massive difference in pricing but all the above are selling well. People for the most part are willing to pay if they think it is value for money. You need to convince them it is, not blame the platform.
On the other hand itunes users seem to be dumb enough to be happy to pay £0.99 for a fart app so maybe it isn't all that hard to get them to part with money for stuff that sensible people look at and decide it really isn't worth paying for.