If you are new to Upwork, receiving an offer with no prior interview could be sketchy. I would definitely not accept. Don't be afraid to ask questions about the gig and the client. The only time I said yes to an offer prior to an interview, the client was very demanding and the contract did not go well.
I've had a small number of these. In my case they were just clients new to Upwork who didn't know the system. I basically treated them the same as any other potential client, discussing the job before accepting (or rejecting) it. I was able to communicate with them without accepting the offer. Don't you have a chat room for them?
P.S. Yes, you can't see the client's history. That didn't matter in my cases as they were new to Upwork. In the past, moderators have said that you can contact customer support to get info about the client's history.
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