Good for you if you've been happily using them for years and I guess you're into their earn interest feature that makes you earn passively. It's not going to last forever, why say so? Just look at those platforms that have the same feature, they never stayed forever.

You may be happy taking those interest profits on a daily basis but it's not really a sustainable business model unless they're allotted a lot of money that they will do it for free.

But I don't think such business will keep that model, maybe they can but there will be adjustment of rates until you barely profit from it anymore.