They have all kind of trades that allows them to move around : the ever present food trucks or amusements machines for fairs, the traditional chair seating and cushioning repairs (it costs a lot, and their unique abilities and traditions is sought for antiques).
They also do all kinds of odd jobs on the cheap. Redoing the whole masonry isn't something you would ask someone who isn't seriously settled but simply refreshing a paint job? Cleaning up a roof, a driveway? Trimming a few tall trees? Sure.
Are they clean about taxes? Probably not.
Are they all drug smugglers and thieves? I don't think more than the general population, really. Crimes tend to get higher when they are around but which part is them doing it and which part is people using the presence of a recurent scapegoat ?
I always thought that organic maps was like magic earth. Where things are clearly laid out from the get go, hence why they were favorites among google maps quitters... Apparently not, and with the donation influx the Trump regime probably brought, it's war for the cash...
I do expect more FOSS based LLC's to get into this kind of drama soon and it's quite sad. The golden lining, I guess, is that projects are finally getting funding, interest from the general public, private firms etc...