$7,000 per plate fundraising dinners

I recall reading about fundraising dinners by presidential candidates in which it was $7,000 per plate or something like that, and wondered why this does not break the political financing laws about how no individual may donate more than $2,500 ($5,000?) towards a political campaign.

If this does not apply, what prevents someone like Jeff Bezos or Bill Gates from strolling into one of these fundraisers for a favored candidate and offering many millions of dollars for a plate, or something?

I assumed those “dinners” were put on by a Super PAC so that donors can get around the donation limit…

Typically they involve giving the maximum to several candidates, and often to the party and related organizations.