At 8 we didn't, we gave him money as and when he needed it, within reason. He played out with friends from that age at weekends and I didnt want him to be the only one who couldnt afford a drink or snack from the local shop when they had been out playing for hours, or to go to Mcds/cinema/swimming etc. He didnt really spend money on anything else, playing out mainly revolved around footie which was free so there didn't seem much point making it pocket money at that age.
He never got an allowance until first year of secondary, age 11. His friends were around the same age when their parents did the same. He got his own bank and savings account with debit card and Apple Pay set up on his phone. The card was also setup on his PS4. Any birthday/Christmas money would go into the savings account and he could transfer between accounts.
We transfered money every month to cover basic school lunch cost and personal spends. We also transfered to his account his bills such as giff gaff phone, netflix, spotify, gym membership. We went over in excel with him his budget and a couple of scenarios such as how much spending just £1 more daily at school lunch would cost over a month. Talked about how he could save to get the new fifa game in September instead of waiting until Christmas. His card was linked to the parent pay account at school which he then managed keeping it topped up from his allowance.
Netflix and Spotify were quickly cancelled, and he started drinking out his water bottle at school lunch and giff gaff goody bag size was reduced when he realised he could spend the money better elsewhere 🤣. We never linked money to contributing to house chores and never used withholding allowance as a punishment.
It was all low risk as the debit card wouldnt let him overspend or he would get email if parent pay went into debt. There was a couple of painful "learning opportunities" 🤦🏻♀️ along the way, which was ok as I think they learn better from actual mistakes. He is 18 and now at uni, working PT, he has just booked his first holiday abroad and has worked out all the costs and had a plan how to pay, and he is very good managing his money.
All that was basically to say, imo, I wouldnt bother with pocket money or kids money cards at just 8, they are more hassle than they are worth.