Faucet limit is definitely not because it's likely to make PD broke. It's probably just to prevent losses for something that does very little benefit for the site.
Yes that's true. Many sites have faucets which are fractions of primedice or they simply have no faucets at all and just use demo bitcoins. People need to understand that faucets are not out there to make you rich, its so you can try out the site before you deposit real BTC to play.
They don't like it when people max out the server loads because some newbie keeps betting 1 Sat using the faucet all day.