Do you this that these are easy to be done? Do you think creating and also managing websites to make earning from it easy? Moreover, it is about the tool website. Not all people can do it and this is complicated. Building this kind of tool for many people may be only in mind, not to be realistic except they are expert on it. So do building blog and make some earning from it, it is also difficult related to the AdSense or joining parties campaign. if you do not know how to make and build a good blog, it will be deleted soon. 
And about getting hired to receive BTC as salary? It only in certain countries who can receive this kind of salary. So this doesn't mean much to you if you cannot work and have specific skills.

And so sorry to say that, but those ideas are not good enough.
I will say that it is much easier to do a signature campaign or other bounty campaigns to earn BTC or valuable crypto. As long as we can find and choose the right projects of course.