Isaiah 4:1, “When this happens, seven women will grab the same man, and each of them will say, ‘I’ll buy my own food and clothes! Just marry me and take away my disgrace.'”
“Take away my disgrace: If a woman did not have a husband or children, it was thought that God was punishing her.” CEV Bible Notes
There would be a shortage of men, seven to one.
These marriages would not be a “marriage of convenience.” The man was required to feed, clothe and have sex routinely with all of his wives. These women were not after his money, but wanted his name and his children.