|Don't work for them: let them go out of business. |
There are lots of signing agencies that would pick up the slack.
Their going under would be a lesson to other signing agencies who pay under $75 and who pay late.
Regarding the woman who said she "sees checks leave the office": Those checks are probably for utilities, phone, etc - companies who would cancel services in a minute if the payment was regularly late. We should cancel, too.