[runesoerensen]

It's worth noting that granting parole seems to be entirely at the USCIS's discretion:

"Under this proposed rule, DHS may parole, on a case-by-case basis, eligible entrepreneurs of startup enterprises"

I think this is different from visas where the applicants/petitioners have at least some legal rights: The USCIS are probably aware that some people are gaming the current visa system, but they may be "forced" to approve visa petitions if all the criteria are met - even in cases where they're obviously not in "the spirit of the law".

The USCIS can likely just refuse to give parole under the new rule if they think someone is abusing the system - and blacklist any startup investors they believe is aiding in such behavior.

You prediction may be right, but I think there's reason to be optimistic. The rule can also be changed more easily than laws if abuse is detected while providing valuable data that can guide future startup visa legislation.