I was here 4 years straight in Ed visas, tourist visas and exempt runs and an 11 day over stay the same year. My remote job also confirmed that i was in fact working for them while on the previous Ed visa. My passport pages were completely full with visas from Thailand so I had to get a new book. They accepted me.
Because it is not ok to live here full time on border bounces and extensions which will most definitely add up to a lot more than 10k baht with a once a year bounce and extension over the 5 years. It is ok to live here full time on the DTV, no questions on entry because it is multiple entry, that’s the point.
Your visa is electronic, they will also stamp like this if you were to have the shiny physical visa sticker in your passport. The whole page stickers are from embassies that you need to attend and apply in person and don’t allow you to apply online through e visa system. Nothing to worry about
90 day report is nothing to do with visas. Anyone that stays in Thailand for over 90 days needs to report to immigration. Tourist visas and visa exempt stamps never go over 90 days that’s why they don’t need to do it.