(Both Hadith arerelated by Muslim in his Sahih Book of Hadith)
Invite them to Islam and inform them of the rights which Allah has ordained upon them. By Allah! If a single person embraces Islam at your hands (i.e. through you), that will be better for you than (possessing) red camels.
These Ayahs and Sahih Hadith are all applicable to calling to Allah (Glorified be He) via modern mass media and other means of communication, such as through lectures, compiling books, publishing treatises, calling to Allah through the phone, in addition to other means of conveying AlHaqq that may be used by whomever Allah has granted sincere intention and useful knowledge and has guided to working in accordance to it.
The reward of deeds depends upon the intentions and every person will get the reward according to what they have intended.
Verily, Allah does not look to your faces and your wealth but He looks to your heart and deeds.
I ask Allah (Glorified and Exalted be He) to guide Muslim scholars and rulers to the best that benefits the people and the country. Indeed, He alone is Able to do so.