It is really free for ever?

as i currently said in my last post i use chatfuel, it was free "for ever", but now they are placing restrinctions in the "free for ever plan", basically i grow my suscribers there that i may lose now (about 700k suscribers). Im not a company nor i sell things, im just a blogger that likes to write tips, so basically i earn money using adsense. Well in one sentence:
Will snathbot be free for ever, with no limitations?, i know they place Made by Snathbot and thats okay with me if they dont charge me for using it.