I wouldn't have attached your AMEX statement. Also, Amex isn't widely accepted in Thailand. This is VISA/MasterCard territory and the 3rd most accepted card is UnionPay. 4th is JCB. Amex comes in at a distant 5th.
Anonymous participant 812 You definitely can't. Now with bank accounts being closed for tourist visa holders, your "credit card" will also be, in the unlikely event the bank was stupid enough to give a tourist a "credit card".
In the past, a lot. These days, I'm not sure. It's not a good option for long-term stay. Fine if you're a genuine student to get through the first 6-12 months in the country.
True, but I think as long as you're actually attending such courses, all is well. I can totally see Thailand NOT granting visas for such courses, for longer than around a year.
Regardless, I can't see a Thai bank issuing a credit card to a farang without a work permit.
Also, if you're talking about a secured credit card, what's the point of that? Just use a debit card with the VISA or MasterCard logo, works almost identically to a credit card.
Only reason to use a credit card is if you actually avail yourself of the credit facility, otherwise, it's not really a credit card anymore.