Pricing varies by plan
Creators cited with this
Creators who use this also use

StreamElements (tip/TTS page)
also used by 1 of them

StreamElements (tipping/TTS page)
also used by 1 of them

StreamElements Tip Page
also used by 1 of them

TTS.Monster
also used by 1 of them
Twitter
also used by 1 of them
LiveSplit
also used by 1 of them