As mentioned before you shouldnt :
- Use same URL in a lot of accounts even if shorten , they will track it anyways.
- Use the same number , ip , device to create multiple accounts
- Buying accounts from non-trusted sellers is bad , you never know which proxys created them and its high likely that they used botnets or public networks to create them , and once instagram finds out a lot of those accounts will be banned.
- Climbing from bot to bot is a no , often changed your Device information, and can lead to checkpoints/captchas and verifications that will flag your account.
Some recommendation would be , keep your tasks/jobs doing a little a lower delays , and spread your actions along more accounts instead of sub-charge less accounts with more actions , if you really want to be "agressive"
Sure its perfectly better to purchase virgin proxys, create your own accounts and manage them your way , some times being cheap will get you more work. Thats just my opinion
