Don't assume FB never offered to purchase. Maybe they did, and Telegram turned them down. Then FB starts the dirty sabotage. We can only speculate if this is a retaliatory move by FB or not, but either way it's NOT ethical - and I'm very glad to hear many people are moving from WatsApp to Telegram against the foul play. Let's hope this is action #1 of FB driving their $19B purchase into the ground. They need to learn a lesson from this.