One act of kindness should be paid back by another act of kindness.

Every time, to an annoyingly repetitive or consistent degree.

Alternative form of a bad penny always turns up

A person or thing which is unpleasant, dishonorable, or unwanted tends to appear (or reappear), especially at inopportune times. / Things that are done improperly eventually cause problems.

(idiomatic) Everything someone uses or does succeeds or becomes better.

(idiomatic, vulgar, derogatory) Everything someone uses or does fails or becomes worse.

One act of malice should be paid back by another act of malice.

In times of change or upheaval, anyone can form a legitimate business from their own personal vision, however different it may be.