All Studio Trap Sample Packs are 100% Royalty Free for selling beats which contain the MIDI / Loop files. This includes Leases and Exclusives online.
As for placements with major artists and or record labels, all samples/files must be cleared with the owner of said file / Studio Trap before seeking profit. The creator of each individual kit is entitled to a royalty/performance split percentage which can be negotiated if the beat gets placed with a major artist and/or major label.
As for producers uploading beats using the sounds, the credit is not mandatory unless stated in kit description.
You cannot use any of the sounds inside the kits to create your sample packs for re-sale or distribute any content to 3rd party websites/distributors.
P.S.A - All demos included in the pack cannot be used for Vocal performances. A separate license is required.