A dying social media platform can be as good as a new one - the incentive for spammers et Al doesn’t exist and neither do many trolls (no audience) so the remaining group can be a good cross-section.
Tumblr is the place where you get followed (sometimes even messaged) by porn spam accounts regularly.
This problem is so infamous that even some ARG creators literally used the "spam bot aesthetic" (but with weirder messages) to pull people in: https://youtu.be/ZaYioM_bsb0
