Upvote:1
Scam aside.
There is really not much that can be deemed acceptable as proof of funds for the purpose of the visa. The issue is not just the availability of funds but also their provenance.
A consulate use paystubs as part of the proof that the applicant will return because they have a legitimate job and the bank statements to proof that the money that the applicant has come from legitimate sources, such as a job, and not from illegal or questionable activities.
There is also a related question related to Schengen visa application but similar logic would apply for the US: