@Chris *******
the MTEV and the DTV aren't the same. The DTV allows you to legally work full-time in Thailand remotely, for up to five years. The regular tourist visas, either single or multiple, don't allow you to work remotely, in theory. Also, while the DTV is good for 5 years at a time, getting a MTEV every year for several years in a row might be frowned upon for some officers. Anyways, that's not about me, you don't need to convince me of anything, but convince the Immigration officers.
Note than when somebody enters Thailand in a MTEV, the IO might ask them to prove they're a tourist: what would you do in Thailand? In my case, I don't need to prove I will do tourism, I always say I come to work remotely, that's what my DTV was granted for.