Read our review of the Maxim88 SG. To accurately gauge its rating. Read our review of the Maxim88 SG. 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.