Seems immigration officers are just getting used to this new VISA. But I do think asking immigration is your only option. It would be pretty sad if someone here recommended you can’t use it when in fact you actually could have used it.
You can create one, but you can be more than certain, that few people, if any would use it and just ask the same question again and again anyway. Unfortunately that’s just the way the Facebook mindset works.
I think it’s a good move. At times I used to forget about my 800,000 baht account because I normally use the monthly 65k a month method (same branch ) to retain my extension of stay, and the 800k account as a backup just in case of miss coding the transfer as a domestic transfer by the banks or whatever could mess me up. Now I just transfer a few baht every few months to avoid any issues.
You may want to touch your account every now and then (even if it’s to add just a couple baht), as I think or heard somewhere inactive accounts can get locked , closed or something unpleasant.