If you preorder, just 100 $/€ are taken from your credit card. The rest is booked shortly before the device gets shipped. So, your risk is 100$/€ if they went bankrupt before you get your device. I have seen worse, imho.

Today? It always has been like that. I remember the nineties popup ad banner days. Not much has changed.

If you want a 100% safe option don’t connect the tv to the internet. Then use your own kodi box or alike.