@msolga,
Well Olga--one can only go on Dylan's "money doesn't talk, it swears" principle which seems from what I have read of history, which is quite a lot, to approximate to true wisdom.
And I assume it's a long list going further than the Top Twenty, like the record charts do for those who are interested, like the Mum and Dad of the idiot who came in 69th in the Great North Run, a boredom marathon, are interested.
I assume that any proposed legislation is run past the largest contributors, unofficially, so that they can give their opinions on it. Whether the opinions cause any adjustments to be made to the proposed legislation is probably a function of how high on the list is the source of the opinions and how easily they can be buried in the small print so that they are not immediately apparent to superficial observers
The University of California being in pole position and the millions of $10 contributors of no account.
What the contributors hope to gain is a matter which it would be best if you took up with them but if it makes more money than the cost of the contribution it can be safely placed in the Profit column.
Which is always a good thing I gather.