Read our review of the Maxim88 SG. Read our review of the Maxim88 SG. . To accurately gauge its rating. Maxim88 SG is a newly established online betting site, so it is still early to give its normal overall rating. Since this is a new betting site, we have not come to any conclusion regarding its rating yet. Since this is a new betting site, we have not come to any conclusion regarding its rating yet.