Many developments in medicine, social customs, and legal proceedings worldwide paved the way for modern commercial surrogacy:

Some jurisdictions specifically prohibit only commercial and not altruistic surrogacy.

Gestational surrogacy, even commercial is absolutely legal in Russia, being available for practically all adults willing to be parents.

The standard fee in commercial surrogacy is about $20,000 with $10,000 going to the surrogate mother.

Yet, the commercial surrogacy is still illegal under the legislation.

Only commercial surrogacy is illegal in Belgium and the Netherlands.

Lower courts have differed in trying to apply that law to cases of commercial surrogacy.

That's partly why commercial surrogacy is illegal in England.

Altruistic surrogacy would become legal, while commercial surrogacy would remain illegal.