Ripple had giveaways here back when they were allowed. Early on there was a giant ripple giveaway, and it must have encouraged some of the people who got coins to get involved and buy more. Whatever your view on its centralization there are people who invested in it for years. Not everyone given free coins dumps, some buy more coins.
Most people will still dump and even worse, some people will find a way to abuse the system and start claiming tons of them.
If the payout is quite high, it is even worth the effort for people to create fake acounts and such. We should not help them in acquiring a stash of coins in this way.