It's rare.
Not everyone and only for specific users, sometimes stake is also partnering with Streamer for "Deposit" bonus. Off course
with a limited offer + different scheme for each streamer.
In-facebook some users share a screenshot promotion, I even don't know.
We had discussed about this type of bonuses of Stake two years ago (
see here). I had received $5 extra reward by depositing $20 only. I'm surprised to see that Stake team is still giving similar type of bonuses to their users. Stake gives this type of exclusive bonuses to some new users to keep them active in their casino.