Three reasons:

Firstly, to stop retail consumers from simply purchasing direct from the dropship site whenever they want to buy something.

Secondly, the infrastructure investment to manage the dropshipping community is quite high. Comparatively the small subscription fee helps us pay for these overheads but saves you from having to.

Thirdly, by paying the membership fee you are essentially gaining access to confidential dropshipping / trade pricing.

It is for these reasons that the membership fee is non-refundable if you wish to cut short your membership. All subscription fees will automatically renew at the appropriate times. However, you can cancel the renewal at any time prior to renewal from the transaction details within your paypal account.