Doing this in the context of blockchain is probably a filter. Only folks who don't think his is all a scam anyway would apply there. So you filter for getting the more gullible folks. That are more likely to have a wallet somewhere.

Just like nigerian prince scams are always full of typos and grammar issues. Because only those not recognizing that as obvious scams click the link and thereby this is a filter to increase signal to noise for the scammers.