The partial headline certainly does suggest they are bragging about their wealth. The “only” is on their debt (Mortgage). If it were about not having enough your would imagine it would be written as “and I STILL owe xxx on my house” and “only have xx in savings”

Will this not just be taken to mean X (as the app maintainer) needs to have the ability to block users it considers to be abusive from the app.

I don’t think this rule is specifying what an individual user of the app must be able to do.