Just so you know that Trust Wallet is also owned by Binance so if you're believing that they're open source, I guess that's giving you an idea of what they really are.
I know that these staking percentages and profits are interesting and encouraging. But in reality, they do change and decrease overtime when more people take part to stake in these. Much worse is you're giving custody to the wallet where you'll be staking these altcoins you've got. That's why it's just better be set to hold it as you've got the keys.