I totally agree with your assessment. The number of people reached by these threads cannot be known but we can be assured that there are those who read and learn. God reaches those He will through many ways. I trust God to use me wherever He places me at different stages in my life and know that He will use my circumstances to His glory. Satan will send those who would try to discourage us but my God reigns.
Amen! And, as long as we are open to the leading of the Holy Spirit, He will speak through us to reach hearts for Christ. The disciples certainly faced much worse than verbal smears and insults. Their very lives were at stake. What we experience here is hardly comparable but we should always endeavour to “speak the truth in love”. God always honors His word and Jesus said, “if any man serve me, him will my Father honour.” John 12:26