it's possibly unfair, but when twitter started exerting strong control over the platform and user experience i went from enthusiastic supporter to "enh, whatever". i will be happy for them if they succeed, and i am glad that they are supporting a lot of valuable use cases, but i no longer have any emotional investment in them as a "space". their ongoing failure to address harassment properly is just the final nail in the coffin; these days, i see it as exactly equivalent to facebook - i use it because that's where the people are, but if it goes the way of myspace i'll switch to whatever replaces it without a backward glance.