What did I do wrong To Get Twitter Ban?

Ok here is what I did please give me some advice on where I went wrong and how to fix this for effective twitter promotion.

Manually made 2 accounts
Used Phoenix Desktop to add about 500 friends a day each
twitted a news rss feed via api
add slogan and website to each account (different slogan/website)
used api for mutuality and karma but never unfollowed yet

Both dead in 2 days. Never tweeted my urls or promoted yet. I did not change the picture of either yet.

Please help me become a better twitter spammer

I would add my website later and only add 100 friends in the first few days. Even after that I never add more than 200 friends a day.

Yeaaah you added a whole lot of friends really quickly. Try to add like a regular user or like how godofhell said.

guess the secret is 2 have an massive amount of accounts then and only follow 200 people a day max?

I recently started another 20 accounts and added 500 people each day to them. They are still live. I honestly don't know why your accounts get banned. My IP is also whitelisted as well though.

do you guys use your seo keywords for names or regular everyday people names? I did and they are aggressive markets. Example this is not my niche but fatloss4idiot, u get the idea.