@Ručman **********
Not quite sure how it's money "lost". For regular travellers the DTV has financial advantages but they're not exactly ground-shaking. DTV is 10,000 baht for five years multi-entry, non-O (with annual re-entry permit) is 28,500 baht, so yes there is a difference of 3,700 baht per year over the five years. But again, that's only for frequent travellers. For me, the biggest advantage is flexibility (not being tied to an annual extension window where presence in Thailand is required) and biggest bonus is not having to visit an immigration office for five years. When you consider some people pay
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+ baht per YEAR to visa agents to arrange their non-O extension, suddenly the DTV looks dirt cheap