Also, is the claim about fees really true? If you look at Strike's FAQ on fees it says it passes all on-chain fees (and lightning fees) through to the user.
Essentially I'm very sceptical at the moment simply because I don't understand what it is about Strike that is saving you anything.
It will (hopefully) provide an easy UX for normies to send funds. Not adding functionality but removing friction.
The process was like "I send $10 of btc here, and it turns up here" but not "I deposited $72 bucks into my account to purchase btc through strike here, which bought $65 worht of bitcoin, which was worth $120 by the time I opened the twitter app and sent the $10 worth of btc, which was worth $9.80 when it arrived and then the guy who received it in his wallet went to withdraw in USD at one of the new cash points by which point the currency had fluctuated again and it was worth $5"