I guess it depend on what you are looking for. The FAQs mentions:
Our team of reviewers are qualified academics across a variety of STEM, humanities, and social science disciplines. Each reviewer is trained to provide meaningful and structured feedback. Reviewers will recommend to the editorial team to accept unconditionally, to accept with minor or major revisions, or to reject a paper.
So it doesn’t sound like this is a pay to publish scheme. If you want some experience presenting research, this seems like a fine option.
On the other hand, if you want to add this on applications, there’s no guarantee this will be seen as an impressive accomplishment.