As you wrote, it's much better to join a signature campaign of a project like 1xbit that has been paying a honestly and stable for several months now.
When it comes to opinions about 1xbit, everyone has the right to have their own. I am not on either side. You also can believe whoever you want.
No member should join the signature campaign of a project which blocks the account of their customers by withholding money. Now the company will continue marketing to get more new customers so that those customer's accounts can be blocked in the same way.
Paying for the signature campaign does not make the company good reputation, pay attention to the fact that the reputation of the company whose signature campaign you are doing is declining day by day!