I have been leaning towards Polygon but I am having trouble finding robust exchanges for it besides Tradeogre.
Why don't you convert btc/doge to polygon via instant exchanges? What exactly is point of using cexes are tradeogre anyway?
Instant exchanges like what? Please enlighten me.
(If you are talking about something on Bestchange, they usually have a minimum exchange amount of $100 or something like that.)
Plus, once you get on polygon (or any other cheap evm like optimism/arbitrum), it's easier to move between evm chains without paying much fees, and as I see from screenshot given in op, there are 0 fees when paying via usdc on base, so you move from polygon to base and do transactions with base usdc and take advantage of this coinbase offer, though base feess are negligible anyway.
Again, I don't really understand how moving tokens between evm changes will not occur a huge gas penalty.
Maybe it's because I come from a bitcoin background but from my limited experience with ETH, I had to pay gas fees to exchange tokens. On a previous order from Porkbun, that is how I lost almost $100 in gas fees over three transactions.