partially funded by the removal of RSU stock grants
$15/hr still isn't much. $30K year. Sure, it would be nice to get a fat payday down the road. People living on low wages have much more immediate needs.
Why wait for a (maybe) payout, if you can't feed your kids today?
And, yes, of course money today is better than maybe money tomorrow. For example, higher pay today could allow someone replace a car that keeps breaking down on them. That reliability and cost savings of not having to pay for repairs can be worth more than stocks in the future.
Edit typo
This raise is a good move, so I'll give them the benefit of the doubt that it won't be a superficial raise until the actual numbers come in.