I have met a few over the last 18 months, one worked for a oil company, another owned a crypto exchange who lived in Dubai, a few work online doing what I don't know, then there is the dodgy ones,
Here in Phuket there has been a few of these taxi app's started up looks like Russians, one I know definitely is, if you watch FB groups, many car rent and bike rent, properties for rent anything to make a few quid.
A friend of ours is a hairdresser (Thai) and she was telling us that we have Russians hairdressers working from home also doing nails, earlier this year up around Bang Tao area 3 of them got caught running a salon from home,