In all honesty - there are only so many writers to review phones, and to properly review a phone they need to spend some time with that phone in daily use. With that in mind, they need to make a decision as to what devices to review and some devices will end up as not reviewed. The devices that don't get reviewed are most likely to be the low-volume devices.
Other than "how does it perform, how does it feel in the hand", a Samsung device is a Samsung device and they have dropped quite a few on the market, at various budget levels. The staff can't POSSIBLY write a review of every single one. That's where the "community review team" comes into play - reviewing the devices they use but someone on that team still needs to have the device to review.
To answer the question - your posts won't be deleted, that would leave holes in threads or comments sections if those comments had direct replies.