Gold=Coins

I personally think that the whole buying coin thing should be your only option. I mean 10 coins for 1 upgrade? That's ridiculous. What it should be is a certain number of gold in the game equals one coin. I'm no expert in deciding this but I think it's more fair.
Everyone has to be active to get the gold, so this opportunity isn't just for the people who like to pay for the game. And this would encourage players to play more and get farther too. I'm sure this has been brought up before but I think it should be again.

But the Haypi wouldn't be making any money

suggested before

Also when you upgrade your reasorce building past level 15 the output doesnt go up much, and there was also a suggested to raise the output past 15. You can do anything coins can do but it takes time, and move city and callback you can avoid by being smart.

coins = money. Also think about resources past 15 as a permament "enchance" and enchance is costing too

but it doesnt count as anywhere near as much as a 50% enhance

I think Haypi would still make some money from the people that can't wait and I think it'd take quite a bit of gold to equal some coins.

Sorry, this is a unreasonable suggestion on Haypi's behalf. They need income to pay developers, promoters, staff, and such. They also need to meet some profit margin. Doing this would sure drop that margin. Just get lucky in Daily Gift. I've gotten 50 coins from it now.

Coins are cheap to make.( costs them nothing) so if they can sell them for 10 cents each, and they sell 10 million coins a year, that's a lot of cash. They ain't changing anything that requires you to pay money, anytime soon.