As much as the excitement will be brewing that the season is drawing closer, it is really the suspense on contract negotiations betweenthat all eyes will be on. It really likes a tense situation at this point given what has occurred in the last month.
There is no benefit for Aiyuk refraining from practicing with the team. All he is going to do his hurt himself more by not participating in a timely manner than if he holds out for a contract extension that probably isn't coming. Aiyuk has zero leverage. Showing up or not won't move the needle for the 49ers to get it done.
If the 49ers were willing to wait until Week 1 by playing hardball for a deal to get done with Nick Bosa, then they are going to feel that way for Aiyuk who isn't close to the same level of impact Bosa is to the team. It's not a fair situation at all for him, which is probably why it lead him to start shining a light through social media.