Yes. You can upload WAV files to the Digital DJ Pool Artist web app. MP3 files are also accepted, but they must be 320 kbps CBR (constant bitrate); the 320 kbps requirement applies to MP3, not WAV.
You can add up to 20 tracks in one batch. The uploader’s per-file size ceiling is 195 MB. This is an app-side ceiling, not a guarantee that every smaller file will be accepted; the upload service can reject a file below it.
Upload through artists.digitaldjpool.com/upload. If a file is rejected as too large, try a smaller file or export a 320 kbps CBR MP3.