1. Not only, I learn from various threads/forums
2. Personal choice
3. In my country are given for free with 0$ credit on them.
4. Well, that you need to search for yourself mate, I don't disclose my sources although I will post some providers that I don't recommend.
Update 2 July.
Well, as you all are aware the limits has been changed so seems that for the moment are allowed 6000 Follows/month and you will receive Block if you go above. For some people they manage to go above the limit so it's 100% sure but I've seen in my accounts that this respects so I intend on respecting it at the moment. This is also related to how many API calls you do per day so this needs to be optimized also. Is it better to do the scraping with a scraper and just import the sources for each account so you don't stress the API calls? That you need to decide for yourself. The game has changed, so the automation needs to be randomized as much as possible. I recommend you change the time intervals 1-2 per month and also use the other tools: story view, browser experience, like comments, repost beside FL, UF, dm. Also, if the growing it's harder, guys... all of you who manage clients, YOU MUST increase the pricing. If it's harder = more expensive!
Accounts botting,
@1000 with a couple of millions of followers (got couple of hundreds ban due to testings after the new IG update).
Have a great week!