The answer is quite simple. They carefully researched which states had the most generous free stuff plans and settled there. They are a lot smarter than the people who voted in governments which doled out these benefits.
If Maine cracks down too hard, look for a lot of them moving to Minnesota.
It's also Obama's diversity joke on lily-white Maine. He ordered USCIS to settle them there.
Five Somali refugees in Maine carrying identical bags of freebies.
They also registered as Democrats......counts for 50 votes when you
add in the multiple identities registered.