Spam is an unwanted message.
Bullying is using power to coerce people.
Since you're the ONLY one downvoting, it's unlikely my messages are unwanted, except by you.
Since you're using your power (money) to try to influence my behavior, you're being coercive.
There's things people like, and things they don't. If I'm using the tools "spammers" use to help people (read the replies and mine if you're in disbelief) become encouraged and stay on the network, it's a net positive.
I do hope my communication is clear.
Spam is mass messaging. You are doing that. And since you are not upvoting the content you compliment, it is clearly an empty message for enriching yourself, another characteristic of spam.
Bullying is using coercion and force for dominating or intimidating. I am downvoting spam and telling you to be a better member of our community. Not the same thing at all.
People are upvoting your spam because they think it is genuine support. You are being deceptive. Instead of acknowledging your error, you are throwing insults and accusations. That is childish. You are masquerading as a beacon of enlightenment, but your actions and replies are counter-evidence aplenty.
I hope my communication is equally clear.