When I was young, divorced and still "in" I had very little money and two babies so there was no money for the contribution box. All I can recall giving them money for was the literature. When that was placed sold, I kept the money to pay for the next batch I had to get for Field Circus.
My father was always dropping money in the contribution boxes at the assemblies every Sunday after they had their accounts report begging for $$$. I never felt like I had any to give and it did make me feel bad sometimes.
Now it makes me very happy that I did not have the money to give them. Now that I have a little extra I give it to my kids - NOT the WTS.