what do you mean " it would make your account more susceptible to ban" if i join more than one social media bounty campaigns?
ban by who? bitcointalk or the social media?
Because to have alts accounts to spam the forum, to milk the system and just to earn some cents by writing stuff like "Good Project, sir", is considered SPAMMING and leads towards a permaban. The permaban included all your accounts, meaning, your person.
You can be banned for:
- Spamming all over the forum (with such one-lined phrases like "Good Project", etc.
- Copy/pasting other's work or by plagiarism
- off-topic or non-sense quotes (take a look at your own activity)
- etc.
If your only goal in here is to earn some cents by joining as many bounties as you can instead of making useful contributions and being a part of the forum, probably you will end banned.
To the OP, no. You are just thinking about ranking-up as a way of milking, even more, the cow. This is far from being a good attitude towards the forum.