Sudden flurry

Is anyone able to tell me why this might be happening? 

I’ve had a sudden flurry of people starting to follow my blog over the last week. Even though I haven’t written anything for a while. 

While it’s lovely if these are genuinely interested people, the cynic in me wonders if it’s a bot of some kind, especially as every one of the followers is from an email address with ‘’. 

Anyone else experiencing this or have any idea why there might suddenly be so much interest from new followers? 

Thank you.