Buy simcards, there people providing them per 100 for $75. so 200 would be like 150. And the best part about that is, you own the simcards self. When the account is big, no one can steal it.
Any reputable and reliable sellers you have dealt with?
Are you using a spare phone and swapping the Sim cards as needed? Or is there any method to connect them to your computer?
Thanks for the valuable insight.