Technically you are staying on a visa which no longer suits your purposes, but you're probably good until someone starts asking.

Likely never but there is always a small possibility that you need to prepare for.

Bkk and fly back on business or first class, and go through fast track.

Business/first class pax don't get bothered

Its just a digital version of the tm6 that you can prefill.

Anyone can as long as you can produce the required bank balance and show you are doing a cultural activity or proof you are a digital nomad online worker

Crypto bros

yep you can just provide your bank statements. Ideally for the whole year to show whatever money you have coming in.

then have the closing balance to whatever they require.

you just have to look for a consulate who doesn't require you to submit tax returns. tax returns are certainly not an official requirement.

And there is no minimum income for this visa so you can also say you aren't required to do a tax return as you earn below the tax free threshold

it sometimes gets sent via another bank.

Go to your bank and get more info on the transaction. You will also have to go to the other bank too.

To avoid the issue, Bangkok bank almost always receives international transfers from abroad as international transfers as long as you don't use fintech companies to make the transfer. Wise might be an exception to the rule where they let you specify that in the reason

haven't seen this asked at all.

What country did you apply from and what nationality are you?

That would be helpful for other people here to give them a heads up as this is a nomad group.

Usually proof of address requested is your address in the country that you are applying from

Attach addendum with translations to English and Thai

Or apply via a German Thai embassy where they will have staff that can likely read it

Everyone that isn't a permanent resident or citizen is a tourist. Some just stay longer than others