Unfortunately neither site has any explanation on their "branding" system but in my experience from similar block explorers that "brand" addresses like this is that they search the internet for places where the addresses were mentioned (usually for the first time) and use
that as the reference. The one on bitinfocharts has about 3 hundred addresses in it!
Yeah I suppose it had something to due with that, the fact that it amazes me is that either someone manually tagged the account or then the "system" behind it is crawnling the web search for the (first?) mention of that address somewhere in the Internet. Spooky stuff.
Who knows this whale
18sFHF3eD25uSRrASfoPBKBaTHjk3N1cWc
No one can know whose address it is if that person wants to remain anonymous, understand that the BTC address is not the same as the bank account.
I've used Crystal Explorer[1] and if we assume the information is correct then the owner of that address is a miner pool called
Eligius. If we look up for it[2] we learn than pool was founded by Luke Dashjr[3], one of Bitcoin Core developers. If you want to spend some time expanding the transactions associated you'll see that some BTC was eventually sent to Mybitcoin[4] - an online wallet - and eventually was sent back to Eligius pool (the list goes on and on). Point is, just move on to another topic of your life OP, admit that you've been scammed and be very much autistic whenever the same situation appears to you (let's hope not).
[1]
https://explorer.crystalblockchain.com/visualization/new/18sFHF3eD25uSRrASfoPBKBaTHjk3N1cWc[2]
https://en.bitcoinwiki.org/wiki/Luke_Dashjr[3]
https://github.com/luke-jr[4]
https://www.mybitcoin.com/