Did Imams(as) tell their companions to give fatwas?

Ahmad Ibn Ali reported that Imam Al-Baqir (a.) said to Aban Ibn Taghlib: “Sit down in the house of prayer in Medina and provide the people with clarification (fatwa), because i love that one like you is seen among my followers.” 

📚Al-Wasa’il-ush-Shia V30 P291

Umayyah Ibn Ali reported that Muslim Ibn Abi Hayyah said: “I was in the service of Abu Abdillah As-Sadiq (a.), after which i wanted to leave him. I said goodbye to him and said: “I want you to provide me with care.” He said: “Come to Aban Ibn Taghlib, for he has already heard numerous sayings (Hadith) from me. So whatever he narrated to you about me, you will also narrate that about me.” 

📚Rijal Al-Kashi P277

Aban Ibn Uthman reported that Imam As-Sadiq (a.) said: “Aban Ibn Taghlib narrated *30,000 sayings (Hadith) about me, so you also narrate them from him.” 

📚Ar-Rijal An-Najashi P12

*most of them havent reached us unfortunately 

Muhammad Hussein Ishfahani(the teacher of Al Khoei) writes:

,,Those hadiths that suggest permissibility of issuing fatwas , although theyre our strongest argument for taqleed, however the problem is that back then Fatwa meant explanation and narration of hadiths.

And at the times of the Prophet and the Imams, the rulings would be conveyed through the transmission of narrations and traditions — and not through operating with opinions and speculations, thus it does not prove anything other than the probative force of a narration.”

📚Nihayatul Diraya Fi Sharh Al Kifaya V3,P466