It varies by deal. If you are a hot-shit growing company, you obviously have more leverage to negotiate for your employees and can get them full-time positions with good retention bonuses/stock.

If you are running out of money and don't have a choice, then your employees are probably going to be rolled into an existing product, and at that point, there's probably not a lot of benefit to Google to hire sub-par employees, so they may not get an offer or might get less than in the above case.

It also depends on what your team does: A failing company that does hard core research and employs a bunch of Phds might be worth a lot more than a random social startup that just employs a bunch of randos.