So... 'chain-love' [1] as distinct from sacrificial true love [2] as distinct from I demand you sacrifice because you chain-love x-person(s) [3]?

1 chain-love - love expressed to the detriment of oneself without choice, often involves forced emotional labor: "Work for free for the company/your coworkers," "I love you, so let me tell you [unhelpful, painful thing] against your wishes"

2 sacrificial true love - acting to benefit of loved one, but detrement to self (may not always be smart or right but is always a free choice with whatever info you have at the time): jumping a grenade, giving your kids the last of the food, risking death so someone won't die alone, giving someone up for a better life

3 a demand for chain-love, often rudely assuming a yes - "Oh, teachers will die for their students in school shootings, because they love the kids. " "Oh, nurses have a calling, we dont need to pay them more."
"I demand you work for free, give up your time, watch this kid, incubate this proto-human, die for x, all because wuv"

See Also:

4) demanding emotional labor with expectation it is owed (not a copper-digger, as a copper-digger exchanges different wealth for work provided)

Gold digger =/= entitled mooch
Copper digger =/= enritled person who [4]s