it is all depend on the risk and reward according of your current need. No one can tell you about offers in reality because all apply to personal desires and goal in the game plus current status.
I will say that if a player it is in the early stages on progress and need silver coins to enhance account in the ARENA SHOP, lazy farmer or limited time to farm to get gold and using14 premium packs to obtain in need of any kind of weapons possibility from legend but also limited in EPIC parts in needs like recoils, torsos, legs and few others it is ok.
For a developed account unless want to risk with boxes to get premium parts not obtained so far, I will say it can pass and get more boxes with the 4k.
Just think according been a pay to win and free to play ways. If is a free to play, how fast you can get tokens back to get at current tokens on hands.
If the player, it is in a search to get a guaranty let say module it can pass to get modules offers and comes with packs as well.
Sometimes we make jokes about offers but all offers are very important to the respective player status if want to spend tokens to advance in some ways a bit faster.
For example, before we used to have the 500 tokens offers, those offers came with one energy and one heat basic module and maybe a few fuels and that was my first offer I got as free player from my achievement's tokens obtained completing those tasks and without it, I had no epic modules in my first mech and was a pain.
Just be careful during development and do not think rushing to show off costing you making mistakes as many including me have done before learning the game.