@damauli_guy thanks for your reply! Agree with everything except, "Once you used that EAD, H4 status wont be valid anymore." How did you figure out this? Did you checked with your attorney? or reputed link e.t.c will be helpful. I did my due diligence, and I think it's fine for H4 to work with USCIS permission. Which means, If you are given EAD, you are allow to work.
Same apply to b1/b2 e.t.c. Actually, they are not allow to work, but with TPS EAD, now they can. I think TPS is design to help people who needed the most in humanitarian ground, not take away what you already have! However, a person violate his or her H-
1B status if s/he uses the EAD to engage in employment for a separate employer and leaves the employer listed on the approved I-129 petition. For F1, they can work with TPS EAD, but they have to make sure that the I-20 is updated with TPS EAD remarks, and the SEVIS record is valid during TPS period, so once the TPS is over they come back to previous F1 status. For that you have to talk with DSO*; by taking min load or taking semester break e.t.c are options.
Please correct me If I'm wrong!