Market capitalization and liquidity (which you're referring to here by "[fiat] flows into the coin") are once again very different things. No coin on the market will sell for its market capitalization because no coin has a single buy order for the entire circulating supply at the market price.

Here's how it really works... for the post and pre swap coins to have equivalent value given the ratio, you need two, and only two things, things:

1. buyers and sellers willing to trade at the appropriate values (market capitalization)
2. enough buyers and sellers to trade at that value to starve buyers and sellers at lower values (liquidity)

That's it. Anyone else suggesting otherwise lacks economic awareness, and yes, there's quite a few people like that running around.

Also, as the coin is proof-of-stake, you need at least double the old coin's circulating supply at the given ratio in the swap's premine to ensure no rouge actors are able to get a majority of the staking power. The team is going to need the 2 billion to keep the new chain stable as large stake holders swap to the new chain. Once that coin is no longer needed, we may consider burning some of it, much like other reputable coins have done. To try to start a new chain without the coin to ensure no one can own the network would be highly irresponsible.

As for the bills, the team runs 20+ VPS of varying resources to provide seeds and explorers for mainnet and testnet, mail, website and other infrastructure. Even at the cheapest configuration on most VPS hosts, you can do the math and know it's not gonna be cheap, and since this old wallet is a beast on memory (a frequent complaint by service providers and individuals hosting core nodes), most of our VPS are not running minimal configurations.