I know from at least two people that immigration officials questioned them about money and the reason for visiting Thailand with DTV visas, and since they were not prepared and could not answer or show their money, they had problems. However, in most cases this does not happen and it depends entirely on the immigration officer who is checking the given individual. Therefore, I think it's important to know about this risk and be prepared for it, which is quite simple.
Immigration upon arrival at the airport can ask the visa holder about anything. Similarly, for DTV visa holders, they may want to see that they have money in their account and can ask about the purpose of their visit to Thailand, as well as inquire about their DTV visa. Therefore, everyone should be prepared for this situation.