Some of the smaller 16" wheel folders have lower weight capacities. My bicycles4u folder is 115kg, I also have a steel 20" budget folder which is 120kg. My mother has an aluminium dunlop folder from sports direct which is 120kg.
On
ebay you can get folders with a weight capacity as low as 60kg. Many of the Argos folders are rated at 80kg it seems.
It doesn't have to be related to the frame sometimes you see a low spoke count on the wheels or thin weak looking single wall rims.
Performance folders from Tern and Dahon I think maybe about 95kg typically.
As a heavier rider I'm a bit obsessed with load capacity and always try to intervene when you get dangerous bike recommendations for people getting back into cycling who are unfit and overweight and clearly shouldn't be considering bikes with a low weight capacity which could be life threatening.
The Greenway bike has no information on weight capacity but clearly has strong double wall rims and they have paid for the extra reinforcing between seat tube and downtube with the extra welded aluminium section. So its clear they have made an effort to strengthen the bike but we can only estimate the weight capacity. However Btwin used to sell the same frame configuration without the frame strengthening, inferior drivetrain, single wall rims with a lower spoke count and that was rated to 85kg approx rider weight. So the Greenway has to got be surely over 100kg realistically I would of thought with all those upgrades.