Why do you believe they are selling AMPs for a marketing campaign then they already got millions of dollars in the crowdfund BTC wallet and AMP will be higher?
Did you ever worked in a corporate environment? I did a couple years ago, and let me tell you, money flies around like dust.
I worked in the finance sector but we worked together with the accounting specialists, and let me tell you your average receipt/statement/payment order document was like 200,000$. And this was a relatively pretty small company involved in mostly real estate in the nearby region.
When we are talking about a global app that has infrastructure costs, marketing costs, and whatever else. The 4 million crowdfunding is nothing.
They will need more funds to kickstart the project. It takes a lot of capital to organize a project of this magnitude.