Maybe you could be more specific for people who do not know. WHAT specific skills can earn you bitcoin. Web design, code, advertisement?
I think any skills including design, coding, ads etc.
The same as you'd earn 'old fashioned' currency - dollars, euros etc.
Yeah buddy these methods would provide some decent amount of income when compare to fauceting or signature campaign. However here in the forum most of people stick to signature campaigns only due to need of less effort.