YES it is legit, however Garena PH does not recommend to use it as of the moment, as it's intended targets is supposedly for Garena Singapore only.
As for those who have already used it, or plan to use it, do so at your own risk. Should there be any problems encountered with this, Garena PH has no responsibility for it, as we've stated it's SUPPOSEDLY for Singapore only (who knows why people can still access it from other countries).
Closing as requested. Any more inquiries regarding this feature will be closed as requested by Garena PH.