It is definitely mana from heaven, but the barriers can be somewhat high depending on the contractor's locale:
1) they need to be able to successfully navigate their own country's tax and self-employment paperwork and regulations;
2) they need enough up-front capital to purchase powerful-enough equipment to do the job in the first place; and
3) they need telecom infrastructure that presumably supports high-speed internet (i.e. faster than dial-up).