If you have an economic fee is like 1 or 2 sat/vbyte, the extra fee from Trusted coin will be small fee.
If the economic fee is 30 sat/vbyte of 100 sat/vbyte, when mempools congest, the extra fee from Trusted coin will be no longer small, but it will become bigger and more expensive.
Trustedcoin charge a fixed fee and that doesn't depend on the fee rate and how congested the network is.You can either pay 0.0005 BTC for every 20 transactions or 0.00125 BTC for every 100 transactions.
Thanks hosse. I'm no bitcoin PhD but by just trying and cancelling my transaction 15 times I figured out that TrustedCoin's fee is NOT flexible.
I appreciate everyone's comments. This forum is really a gem if you're a newbie and don't like to RTFM.
Thanks again, I plan to use up the remaining 19 transactions (I understand the risks now!) and then move on to, probably, just purchasing a 1TB sdd with the money I will have saved by then, and just use Bitcoin Core happily ever after