Yesterday I receivied the following letter:
Dear Tomaz Pisanski,
I am writing to introduce the XXXX to you. XXXX is a new journal launched by the YYYY from USA. With an open access publication model of this journal, all interested readers around the world can freely access articles online at http:ZZZ without subscription. We are soliciting scholars to form the editorial board. If you are interested, please send your resume along with your areas of interest to WWWW. Manuscripts should be submitted to the journal online at: http:UUU. Once accepted for publication, your manuscripts will undergo language copyediting, typesetting, and reference validation in order to provide the highest publication quality possible.
Please do not hesitate to contact me if you have any questions about the journal.
I removed the actual journal title and other details since they are not important for this question. I would like to have some general criteria or guidelines that would help me decide whether to accept such an offer or not.